{"id":118257,"date":"2024-09-13T01:48:39","date_gmt":"2024-09-13T08:48:39","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=118257"},"modified":"2024-10-23T23:15:43","modified_gmt":"2024-10-24T06:15:43","slug":"obd-code-readers-and-other-diagnostic-tools-for-cars","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/obd-code-readers-and-other-diagnostic-tools-for-cars\/","title":{"rendered":"OBD Code Readers and Other Diagnostic Tools for Cars"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 7<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column118257_cb2a42-14 > .kt-inside-inner-col,.kadence-column118257_cb2a42-14 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118257_cb2a42-14 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118257_cb2a42-14 > .kt-inside-inner-col{flex-direction:column;}.kadence-column118257_cb2a42-14 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118257_cb2a42-14 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118257_cb2a42-14{position:relative;}@media all and (max-width: 1024px){.kadence-column118257_cb2a42-14 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118257_cb2a42-14 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118257_cb2a42-14 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-d1abcf  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-79182c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89, .wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89[data-kb-block=\"kb-adv-heading118257_1f0900-89\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89[data-kb-block=\"kb-adv-heading118257_1f0900-89\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading118257_1f0900-89[data-kb-block=\"kb-adv-heading118257_1f0900-89\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading118257_1f0900-89 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading118257_1f0900-89\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble codes (DTCs) can point you in the right direction if you or your mechanic is looking to fix problems in your vehicle. However, the code isn&rsquo;t a full diagnosis.<\/li>\n\n\n\n<li>You can use an OBD code reader or scan tool to view any DTCs your vehicle&rsquo;s logged.<\/li>\n\n\n\n<li>&nbsp;From there, use a multimeter or circuit tester for electrical system trouble codes, a cooling system pressure tester for cooling system pressure trouble codes, and an ignition spark tester for ignition-related codes.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>If anything the powertrain control system can detect becomes an issue, the ECM\/TCM\/PCM will log a diagnostic trouble code (DTC). This code can point you in the right direction if you or your mechanic is looking to fix the problem. However, the code isn&rsquo;t a full diagnosis. There are various possible causes behind each code. Here&rsquo;s a list of tools that can help you diagnose diagnostic trouble codes yourself:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">OBD Code Readers &amp; Scan Tools<\/h2>\n\n\n\n<p>Let&rsquo;s start with <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD code\">OBD code<\/a> readers and scan tools. These car diagnostic tools retrieve data from your vehicle&rsquo;s PCM. They then relay this data as diagnostic car trouble codes for you to look through. Code readers are generally more bare-bones than professional scan tools. While scan tools will give you data readouts and troubleshooting tips, code readers are still a good pickup if you&rsquo;re just starting out. They&rsquo;ll tell you the codes plain and simple, and those codes will be a good starting point for the rest of your diagnosis.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/scan-tool\/performance-tool\/pftw2977\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Performance Tool OBDII Digital Diagnostic Scan Tool\">Performance Tool OBDII Digital Diagnostic Scan Tool<\/a> is a great buy for any budding DIYer in need of a simple and effective code reader. Here are some scan tools you can find at CarParts.com:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"423\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-1024x423.jpg\" alt=\"scan tools with different features and prices\" class=\"wp-image-120497\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-1024x423.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-300x124.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-768x318.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-1536x635.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices-150x62.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/scan-tools-with-different-features-and-prices.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">It all depends on how much you want to spend, and with a scan tool, you get what you pay for. If you do a lot of DIY work requiring datastream monitoring (live data from the PCM) a more expensive scan tool might be in order. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>More affordable scan tools are read-only. More expensive scan tools can issue commands to the PCM to turn on the cooling fan or kill separate injectors when you&rsquo;re chasing a misfire. Also, the more expensive units can program keys and reset TPMS sensors. If you just want to pull a code and get an idea of why the MIL is illuminated, an inexpensive code reader might be better.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"421\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app-1024x421.jpg\" alt=\"dongles you can buy that will interface with your smartphone via an app\" class=\"wp-image-120499\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app-1024x421.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app-300x123.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app-768x316.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app-150x62.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/dongles-you-can-buy-that-will-interface-with-your-smartphone-via-an-app.jpg 1317w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p>There are also dongles you can buy that will interface with your smartphone via an app (see photo). Even some of the more inexpensive dongles have tremendous capabilities and the ELM 327 will even interface with your Android radio if you install the app. Dongles like the BlueDriver are more powerful and professional grade.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/how-to-conduct-a-parasitic-draw-test-plus-causes-and-prevention-tips\/\" target=\"_self\" rel=\"dofollow\" class=\"uc5d4ff43da654f187edfbf81a1cf9976\"><style> .uc5d4ff43da654f187edfbf81a1cf9976 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .uc5d4ff43da654f187edfbf81a1cf9976:active, .uc5d4ff43da654f187edfbf81a1cf9976:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .uc5d4ff43da654f187edfbf81a1cf9976 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .uc5d4ff43da654f187edfbf81a1cf9976 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .uc5d4ff43da654f187edfbf81a1cf9976 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .uc5d4ff43da654f187edfbf81a1cf9976:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">How to Conduct a Parasitic Draw Test Plus Causes and Prevention Tips<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Other Testers<\/h2>\n\n\n\n<p>As we&rsquo;ve mentioned, the OBD code only points you in the direction of the problem. If you want to thoroughly diagnose your vehicle&rsquo;s systems, there are a few other testers you might want to pick up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Multimeters<\/h3>\n\n\n\n<p>If the OBD codes that your vehicle is triggering are related to its electrical system, pick up a multimeter. Multimeters are invaluable tools for testing your vehicle&rsquo;s electrical system. They measure current, resistance, and voltage, and more expensive multimeters can measure temperature and frequency.<\/p>\n\n\n\n<p>You can even test your car&rsquo;s battery with a multimeter. The same goes for your vehicle&rsquo;s headlight bulbs, fuses, and alternator.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"444\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-1024x444.jpg\" alt=\"various multimeters for diy work\" class=\"wp-image-120498\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-1024x444.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-300x130.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-768x333.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-1536x667.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work-150x65.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/various-multimeters-for-diy-work.jpg 1650w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Usually for DIY work all you need is an inexpensive DVOM. Here are a couple available at CarParts.com. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/multimeter\/otc\/otc3505a\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OTC Multimeter\">OTC Multimeter<\/a> (shown on the right in the photo) includes various contact tips and different wires to suit different needs. Its sleek design has accents of yellow and blue on its labels, and it comes with a 24-month warranty.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/multimeter\/performance-tool\/pftw2974\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Performance Tool Universal Multimeter\">Performance Tool Universal Multimeter<\/a> (shown on the left in the photo) is simple and no-nonsense. It has white labels on a black body and comes with a set of wires. As a compact tool, it&rsquo;ll surely serve you well as you hunt down what&rsquo;s causing those electrical trouble codes.<\/p>\n\n\n\n\n\n\n<h3 class=\"wp-block-heading\">Circuit Testers<\/h3>\n\n\n\n<p>A car <a href=\"https:\/\/www.carparts.com\/circuit-tester\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"circuit tester\">circuit tester<\/a> is another tool you can use to test your vehicle&rsquo;s electrical lines and identify what&rsquo;s triggering certain diagnostic trouble codes. It&rsquo;s a portable electrical circuit shaped like a screwdriver with a wire running out its bottom attached to a metal clamp.&nbsp;<\/p>\n\n\n\n<p>While you can&rsquo;t use a circuit tester to retrieve data like fuel trim (that&rsquo;s only available using scan data), you can use a circuit tester with a low impedance bulb (pulls about .25 amps) to check for power at components like injectors or solenoids.<\/p>\n\n\n\n<p>A low impedance circuit tester is better than a multimeter or scan tool for checking power. The multimeter can show voltage and measure resistance, but can&rsquo;t tell you if there is enough current being delivered to carry the necessary electrical load.<\/p>\n\n\n\n<p>To use a circuit tester, attach the clamp to ground and tap the probe tip to the electrical circuit&rsquo;s source. If the bulb in the handle lights, it means electricity is flowing between those components.&nbsp;<\/p>\n\n\n<style>.kadence-column118257_c93ae5-ca > .kt-inside-inner-col,.kadence-column118257_c93ae5-ca > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118257_c93ae5-ca > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118257_c93ae5-ca > .kt-inside-inner-col{flex-direction:column;}.kadence-column118257_c93ae5-ca > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118257_c93ae5-ca > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118257_c93ae5-ca{position:relative;}@media all and (max-width: 1024px){.kadence-column118257_c93ae5-ca > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118257_c93ae5-ca > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118257_c93ae5-ca kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id118257_3eff90-47 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id118257_3eff90-47 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id118257_3eff90-47 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id118257_3eff90-47 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id118257_3eff90-47 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id118257_3eff90-47 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id118257_3eff90-47 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id118257_3eff90-47 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{display:flex;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{min-height:45px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col,.kadence-column118257_1b41d3-fc > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > *, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118257_1b41d3-fc{position:relative;}@media all and (max-width: 1024px){.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > *, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column118257_1b41d3-fc > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > *, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-image, .kadence-column118257_1b41d3-fc > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column118257_1b41d3-fc > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118257_1b41d3-fc kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image118257_137efe-d0.kb-image-is-ratio-size, .kb-image118257_137efe-d0 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image118257_137efe-d0.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image118257_137efe-d0 .kb-image-is-ratio-size{align-self:unset;}.kb-image118257_137efe-d0 figure{max-width:45px;}.kb-image118257_137efe-d0 .image-is-svg, .kb-image118257_137efe-d0 .image-is-svg img{width:100%;}.kb-image118257_137efe-d0 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image118257_137efe-d0\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column118257_f58db1-94 > .kt-inside-inner-col,.kadence-column118257_f58db1-94 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column118257_f58db1-94 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column118257_f58db1-94 > .kt-inside-inner-col{flex-direction:column;}.kadence-column118257_f58db1-94 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column118257_f58db1-94 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column118257_f58db1-94{position:relative;}@media all and (max-width: 1024px){.kadence-column118257_f58db1-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column118257_f58db1-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column118257_f58db1-94 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\nIf you&rsquo;ve disconnected a component and you&rsquo;re checking the terminals in the connector, do not shove the tip of the probe into the terminal or you&rsquo;ll destroy it. Inexperienced DIY folks have a tendency to do this.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/patty-gill-uses-obd-ii-scanner-from-carparts-com-to-diagnose-check-engine-light-issues\/\" target=\"_self\" rel=\"dofollow\" class=\"ud1d1af299665d042ff6b3f14ba1cdcfe\"><style> .ud1d1af299665d042ff6b3f14ba1cdcfe { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .ud1d1af299665d042ff6b3f14ba1cdcfe:active, .ud1d1af299665d042ff6b3f14ba1cdcfe:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .ud1d1af299665d042ff6b3f14ba1cdcfe { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .ud1d1af299665d042ff6b3f14ba1cdcfe .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .ud1d1af299665d042ff6b3f14ba1cdcfe .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .ud1d1af299665d042ff6b3f14ba1cdcfe:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">Patty Gill Uses OBD-II Scanner From CarParts.com to Diagnose Check Engine Light Issues<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>Logic probes will have both a positive and a negative connection and an LED that lights up green for ground and red for B+. This is handy for checking reversible motor circuits like power windows.<br>Keep in mind: circuit testers are great for testing wiring connectors and other automotive electronics. They&rsquo;re not suitable for measuring sensor voltages but are good for routine electrical troubleshooting on anything that isn&rsquo;t a computer input. To begin with, you won&rsquo;t know how much voltage is present using a logic probe or circuit tester, only that voltage is present, and that&rsquo;s not good enough when you&rsquo;re chasing most trouble codes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-1024x683.jpg\" alt=\"OEMTOOLS One Handed Wire Piercing Circuit Tester image\" class=\"wp-image-118511\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-One-Handed-Wire-Piercing-Circuit-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The OEMTOOLS One-Handed Wire Piercing Circuit Tester can help you troubleshoot primary circuits in difficult areas around your vehicle.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/circuit-tester\/oemtools\/g5225887\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS One-Handed Wire Piercing Circuit Tester\">OEMTOOLS One-Handed Wire Piercing Circuit Tester<\/a> helps you troubleshoot primary circuits in difficult areas around your vehicle. It has a 12-foot heat- and oil-resistant coiled cord and a hook-like tip to hang on wires.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-1024x683.jpg\" alt=\"OEMTOOLS Relay Circuit Tester image\" class=\"wp-image-118512\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Relay-Circuit-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The OEMTOOLS Relay Circuit Tester has a different design from the typical circuit tester and has large metal clamps instead of a single small clamp and metal tip.<\/figcaption><\/figure>\n\n\n\n<p>For relay circuits, you can buy the <a href=\"https:\/\/www.carparts.com\/circuit-tester\/oemtools\/g5227211\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS Relay Circuit Tester\">OEMTOOLS Relay Circuit Tester<\/a>. It has a different design from the typical circuit tester and has large metal clamps instead of a single small clamp and metal tip. This circuit tester also includes different relay leads.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-1024x683.jpg\" alt=\"OEMTOOLS Heavy Duty Circuit Tester image\" class=\"wp-image-118513\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Heavy-Duty-Circuit-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The OEMTOOLS Heavy-Duty Circuit Tester might look like a simple tool, but it is made with quality materials.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/circuit-tester\/oemtools\/g5225019\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS Heavy-Duty Circuit Tester\">OEMTOOLS Heavy-Duty Circuit Tester<\/a> is a simple tool made with quality materials. It has a stainless steel probe with a heavy-duty cord and an insulated ground clip. In addition, this circuit tester has a high-intensity LED bulb in its handle for easier visibility.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cooling System Pressure Testers<\/h3>\n\n\n\n<p>If your vehicle recently had a cooling system flush, you need to make sure the cooling system pressure is at the correct psi. Otherwise, the system might fail to cool your engine, and you&rsquo;ll face a ton of different trouble codes. The <a href=\"https:\/\/www.carparts.com\/cooling-system-pressure-tester\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"cooling system pressure tester\">cooling system pressure tester<\/a> attaches to the radiator, where you can pump it by hand to match the pressure level written on the radiator cap. After leaving the tester there for 20 to 30 minutes, see if the pressure reading on the tester is lower than before. If it is, look for a leak. You can also use the cooling system pressure tester to test the radiator cap if it has a radiator cap attachment.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/a-short-course-on-fuel-systems\/\" target=\"_self\" rel=\"dofollow\" class=\"u4d24c41b5ad3d610bcdcb202ff131f0c\"><style> .u4d24c41b5ad3d610bcdcb202ff131f0c { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u4d24c41b5ad3d610bcdcb202ff131f0c:active, .u4d24c41b5ad3d610bcdcb202ff131f0c:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u4d24c41b5ad3d610bcdcb202ff131f0c { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u4d24c41b5ad3d610bcdcb202ff131f0c .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u4d24c41b5ad3d610bcdcb202ff131f0c .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u4d24c41b5ad3d610bcdcb202ff131f0c:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">A Short Course on Fuel Systems<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-1024x683.jpg\" alt=\"Motorad Cooling System Pressure Tester image\" class=\"wp-image-118514\" style=\"object-fit:cover\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/Motorad-Cooling-System-Pressure-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Don&rsquo;t forget to get yourself a handy cooling system pressure tester like a Motorad Cooling System Pressure Tester.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/cooling-system-pressure-tester\/motorad\/mrdmt300\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Motorad Cooling System Pressure Tester\">Motorad Cooling System Pressure Tester<\/a> is a handy tool that comes in its own black case. This keeps all its important fittings together.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-1024x683.jpg\" alt=\"OEMTOOLS Cooling System Pressure Test Pump image\" class=\"wp-image-118515\" style=\"object-fit:cover\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Cooling-System-Pressure-Test-Pump.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The OEMTOOLS Cooling System Pressure Test Pump is another great option if you want a simple tool to check your cooling system&rsquo;s pressure levels.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/cooling-system-pressure-tester\/oemtools\/g5227069\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS Cooling System Pressure Test Pump\">OEMTOOLS Cooling System Pressure Test Pump<\/a> is another option if you want a simple tool to check your cooling system&rsquo;s pressure levels. It can work with most cooling system adapters and has a lever-style pressure relief valve for easy release.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ignition Spark Testers<\/h3>\n\n\n\n<p>If your code reader is picking up ignition-related diagnostic trouble codes, you might want to invest in a car ignition <a href=\"https:\/\/www.carparts.com\/spark-tester\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark tester\">spark tester<\/a>. Ignition coils take the low electrical voltage from the battery and transform it into high voltage to the spark plugs. Your code reader can point you to the specific engine cylinder experiencing issues. From there, disassemble and retrieve the ignition coil and plug the tester in. Follow the tester&rsquo;s instructions after that. Once you start the engine up with the ignition spark tester attached, it will spark if the ignition coil is in full working order. If it doesn&rsquo;t spark, you&rsquo;ve likely found the cause behind your ignition-related DTC.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-1024x683.jpg\" alt=\"OEMTOOLS Adjustable Ignition Spark Tester image\" class=\"wp-image-118516\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Adjustable-Ignition-Spark-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The OEMTOOLS Adjustable Ignition Spark Tester can simulate spark plugs under compression load to adequately test their spark length.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/spark-tester\/oemtools\/g5225069\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS Adjustable Ignition Spark Tester\">OEMTOOLS Adjustable Ignition Spark Tester<\/a> is a particularly versatile tool that works with large and small engines. It can simulate spark plugs under compression load to adequately test their spark length.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-1024x681.jpg\" alt=\"OEMTOOLS Inline Ignition Spark Tester image\" class=\"wp-image-118517\" style=\"object-fit:cover\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-768x511.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/09\/OEMTOOLS-Inline-Ignition-Spark-Tester.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Another useful diagnostic tool is the OEMTOOLS Inline Ignition Spark Tester that is sturdy enough to withstand rough use.<\/figcaption><\/figure>\n\n\n\n<p>Meanwhile, the <a href=\"https:\/\/www.carparts.com\/spark-tester\/oemtools\/g5225227\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OEMTOOLS Inline Ignition Spark Tester\">OEMTOOLS Inline Ignition Spark Tester<\/a> is a hands-free tester with a clear plastic body sturdy enough to withstand rough use.<\/p>\n\n\n\n<p>And there you have it! You likely don&rsquo;t need all these tools in your automotive arsenal, but they&rsquo;re great to have on hand when you&rsquo;re itching to find those troublesome DTC triggers.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 7<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>If anything the powertrain control system can detect becomes an issue, the ECM\/TCM\/PCM will log a diagnostic trouble code (DTC)&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/obd-code-readers-and-other-diagnostic-tools-for-cars\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":118523,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3743],"tags":[4320,2026,1439,4227,4321],"ppma_author":[2607,2985],"class_list":{"0":"post-118257","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-maintenance","9":"tag-circuit-tester","10":"tag-cooling-system-pressure-tester","11":"tag-multimeter","12":"tag-scan-tool","13":"tag-spark-tester","14":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>OBD Code Readers and Other Diagnostic Tools for Cars - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"It can be hard to diagnose your vehicle without the proper testers. Here are some of our recommendations for your DIY projects.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/obd-code-readers-and-other-diagnostic-tools-for-cars\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"OBD Code Readers and Other Diagnostic Tools for Cars - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"It can be hard to diagnose your vehicle without the proper testers. 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