OBD-II Trouble Codes

P0404 Code: Exhaust Gas Recirculation Circuit Range/Performance Problem

OBD-II codes make it easier to find out what’s wrong with your car—but there are over a thousand codes, which makes it impossible to memorize their meanings and workarounds. Without...Read more

OBD-II Trouble Codes

P0306 Code: Cylinder 6 Misfire Detected

Engines contain cylinders that convert fuel into mechanical energy. Combustion within the cylinders fire at the right time to maximize the power they generate. When the engine’s 6th cylinder suffers...Read more

OBD-II Trouble Codes

P0705 Code: Transmission Range Sensor Circuit Malfunction (PRNDL Input)

A P0705 code is a generic powertrain code that can be triggered in select vehicles built from 1996 onward. This OBD-II code may present common symptoms in different types of...Read more

OBD-II Trouble Codes

P0122 Code: Throttle Position Sensor/Switch A Circuit Low Input

When the Check Engine Light on your car’s dashboard lights up, it’s time to use a diagnostic scanner to determine what faults triggered the CEL. Typically, there are a variety...Read more

OBD-II Trouble Codes

P0131: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)

Oxygen sensors measure the amount of oxygen in the exhaust stream. Your car’s primary computer, which is often referred to as the powertrain control module (PCM), uses the signal from...Read more

OBD-II Trouble Codes

P2002 Code: Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

Diesel engines have a lot of advantages aside from providing better torque. The catch is, they produce more soot, which is a black, carbon-based substance that is damaging to the...Read more

OBD-II Trouble Codes

P0449 Code: Evaporative Emission System Vent Control Circuit Intermittent

Automotive design has come a long way since the Environmental Protection Agency (EPA) enforced stricter regulations on vehicle emissions in the ‘70s. One of the innovations that have helped modern...Read more

OBD-II Trouble Codes

P2135 Code: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation

You’re stopped at a stoplight, waiting for the light to turn green. Once the light changes, you suddenly notice that no matter how hard you step on the gas, engine...Read more

OBD-II Trouble Codes

P0137 Code: Oxygen Sensor Circuit Low Voltage (Bank 1, Sensor 2)

OBD-II codes help you find out what’s wrong with your car. If your scan tool is showing a P0137 trouble code, this points to a problem with one of your...Read more

OBD-II Trouble Codes

P0132: Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 1)

Decreased fuel efficiency, a rough-running engine, and an illuminated check engine light can point to a lot of issues. However, if your OBD-II scanner stores the P0132 code, there is...Read more

OBD-II Trouble Codes

P0013 Code: Exhaust “B” Camshaft Position Actuator Circuit/Open (Bank 1)

Car diagnostic codes have been standardized to help mechanics and car owners find out what is wrong with a vehicle. To resolve a certain code, you’ll have to first find...Read more

OBD-II Trouble Codes

P0101 Code: Mass or Volume Air Flow ‘A’ Circuit Range/Performance

The powertrain control module (PCM) ensures the correct amount of fuel is delivered to the engine using data collected from multiple vehicle systems. Different sensors gather this information, helping create...Read more

OBD-II Trouble Codes

P0304 Code: Cylinder 4 Misfire Detected

The P0304 engine code can compromise your driving experience, so resolve the underlying cause (or causes) immediately. If your check engine light is on and the OBD-II scanner reads a...Read more

OBD-II Trouble Codes

P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

A rough-running engine can point to a lot of issues. But if after running your OBD-II scanner, you see the P0135 code come up, your oxygen (O2) sensor could be...Read more

OBD-II Trouble Codes

P0452 Code: Evaporative Control System Pressure Sensor Low Input

While more common in Chevy and Dodge vehicles, P0452 is a generic OBD-II code that’s supported by various makes and models. However, keep in mind that diagnostic and repair steps...Read more

OBD-II Trouble Codes

P0012 Code: Intake (A) Camshaft Position Timing – Over-Retarded (Bank 1)

If your check engine light is illuminated and you notice your engine is suffering from poor idling or struggling to start properly, there may be an issue with its camshaft...Read more

OBD-II Trouble Codes

P0136 Code: O2 Sensor Circuit (Bank 1, Sensor 2)

The performance of your vehicle’s engine relies heavily on maintaining the right air-to-fuel mix for combustion. The engine control module (ECM) determines the proper ratio by collecting data from different...Read more

OBD-II Trouble Codes

P0341 Code: Camshaft Position Sensor ”A” Circuit Range/Performance (Bank 1 or Single Sensor)

Engine diagnostic trouble codes (DTC) are assigned to identify various problems in a car. There are hundreds of codes with different character combinations, meaning one cannot simply memorize all of...Read more

OBD-II Trouble Codes

P0500 Code: Vehicle Speed Sensor (VSS) Malfunction

There are hundreds of components inside a car, and when one fails, the onboard computer will let the driver or mechanic know which component may be the root of the...Read more

OBD-II Trouble Codes

P0332 Code: Knock Sensor 2 Circuit Low Input (Bank 2)

Abnormal combustion (either pre-ignition or detonation) leads to spark knock. Because the phenomenon can easily damage the engine, it must be controlled.  The powertrain control module (PCM) monitors engine "knocking"...Read more

OBD-II Trouble Codes

P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)

If you drive a fairly modern vehicle, it might be equipped with a heated oxygen sensor (HO2) instead of a regular oxygen sensor. The former contains a heating element that...Read more

OBD-II Trouble Codes

P0017 Code: Camshaft Position B – Camshaft Position Correlation (Bank 1)

The P0017 error code means there might be an issue with your engine’s camshaft and crankshaft. These two vital components must be perfectly synchronized for your car’s engine to perform...Read more

OBD-II Trouble Codes

P0740 Code: Torque Converter Clutch Solenoid Circuit/Open Circuit Malfunction

Does your vehicle often stall when coming to a stop, exhibit shifting issues, and show signs of reduced fuel economy? Your torque converter clutch solenoid may be at fault. To...Read more

OBD-II Trouble Codes

P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)

Poor fuel economy, a failed emissions test, and engine problems—these are symptoms that a lot of automotive issues share. Run your OBD-II scanner to narrow down the problem. If it...Read more

OBD-II Trouble Codes

P0106 Code: Manifold Absolute Pressure/BARO Sensor Range/Performance

Excessive exhaust emissions and engine performance issues can indicate a lot of problems. If your OBD-II scanner identifies a P0106 code after checking, your manifold absolute pressure (MAP) sensor and...Read more

OBD-II Trouble Codes

P0305 Code: Cylinder 5 Misfire Detected

The OBD-II code P0305 means that the powertrain control module (PCM) has detected a misfire in one of the engine’s cylinders. It usually stems from a problem with the ignition...Read more

OBD-II Trouble Codes

P0463 Code: Fuel Level Sensor “A” Circuit High

The P0463 code involves your car’s fuel level sensor. One of your car’s computers (usually the powertrain control module or PCM) will set the code when the fuel level sensor's...Read more

OBD-II Trouble Codes

P0457 Code: Evaporative Emission System Leak Detected (Fuel Cap Loose/Off)

Is your check engine light illuminated? Does your vehicle smell of fuel? Your fuel cap may either be loose or missing. If your OBD-II scanner indicates a code P0457, address...Read more

OBD-II Trouble Codes

P0741: Torque Converter Clutch Solenoid Circuit Performance/Stuck Off

P0741 is a generic OBD-II code that is supported by various makes and models. This particular code involves your torque converter clutch or TCC. In this article, we will go...Read more

OBD-II Trouble Codes

P0121 Code: Throttle/Pedal Position Sensor “A” Circuit Range/Performance Problem

The error code P0121 may indicate an issue related to your engine’s throttle position sensor. Like other throttle position sensor-related codes, this could lead to serious problems and can result...Read more

OBD-II Trouble Codes

P2096 Code: Post Catalyst Fuel Trim System Too Lean (Bank 1)

There is an ideal ratio for the mixture of air and fuel that your car’s engine burns in its combustion chambers. An excessive amount of oxygen in the mixture means...Read more

OBD-II Trouble Codes

P0325 Code: Knock Sensor Malfunction (Sensor 1, Bank 1)

The P0325 code indicates a possible problem with your engine’s knock sensor. What exactly does it mean if your car registers this code on an OBD-II scanner and what can...Read more

OBD-II Trouble Codes

P0102 Code: Mass Air Flow (MAF) Circuit Low

Lately, you’ve been noticing that your car stalls or runs rougher than before. You eventually decide to use an OBD-II scanner to help you determine whether there’s an issue, and...Read more

OBD-II Trouble Codes

P0443 Code: Evaporative Emission System Purge Control Valve “A” Circuit

The evaporative control (EVAP) system helps prevent fuel vapors from being released into the atmosphere. Depending on the issue experienced by the EVAP system, your car’s primary computer, which is...Read more

OBD-II Trouble Codes

P0302 Code: Cylinder 2 Misfire Detected

The P0302 engine code can cause serious drivability issues, so you’ll need to address the underlying problem (or problems) right away.  If the check engine light has popped up on...Read more

OBD-II Trouble Codes

P0010 Code: “A” Camshaft Position Actuator Circuit (Bank 1)

If your OBD-II scanner is storing a P0010 code, the problem likely has something to do with the engine. But more specifically, it affects the engine’s variable valve timing (VVT)...Read more

OBD-II Trouble Codes

P0507 Code: Idle Control System RPM Higher than Expected

The issues that trigger a P0507 code are usually not severe enough to prevent you from driving your car, but it can cause some difficulties. Arm yourself with the necessary...Read more

OBD-II Trouble Codes

P0335 or Crankshaft Position “A” Circuit Malfunction

The P0335 trouble code indicates a possible issue with your vehicle’s crankshaft. But what exactly does this mean and how can you resolve the problem? Read on to learn more...Read more

OBD-II Trouble Codes

P0016 Code: Camshaft Position A – Camshaft Position Correlation (Bank 1)

The P0016 error code concerns the camshaft and crankshaft—two important components within your vehicle’s engine. These two must be perfectly synchronized for the engine to function properly. So, if your...Read more

OBD-II Trouble Codes

P0138 Code: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)

Is your vehicle triggering a P0138 trouble code on your OBD-II scanner? If so, read on to find out what this code means, what the symptoms and possible causes are,...Read more

OBD-II Trouble Codes

P0113 Code: Intake Air Temperature Sensor 1 Circuit High Input

On the spectrum of OBD-II codes, a P0113 is considered moderately severe. This means that, if you’re having issues with your vehicle and your OBD-II scanner reads a P0113 trouble...Read more

OBD-II Trouble Codes

P0303 Code: Cylinder 3 Misfire Detected

A misfire occurs when there is an insufficient amount of fuel burning in a cylinder. Since the way the engine runs relies heavily on the proper functioning of its cylinders,...Read more

OBD-II Trouble Codes

P0301 Code: Cylinder 1 Misfire Detected

A P0301 is one of a series of OBD-II error codes that are triggered when your vehicle’s computer has detected a “misfire.” What exactly does this diagnostic code entail? Read...Read more

OBD-II Trouble Codes

P0442 Code: Evaporative Emission Control System Leak Detected (Small Leak)

The P0442 code is one of the many OBD-II codes that can trigger if your vehicle perceives an issue with its EVAP system. In this article, we’ll explain what a...Read more

OBD-II Trouble Codes

P0401 Code: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected

The error code P0401 is one of the 20 most common OBD-II codes faced by a lot of car owners, although it can be more prevalent in certain makes, such...Read more

OBD-II Trouble Codes

P0496 Code: EVAP Flow During a Non-Purge Condition

Is your vehicle recording a P0496 on your OBD-II scanner? This code, which is one of the many OBD-II codes that can trigger the Check Engine Light, may not present...Read more

OBD-II Trouble Codes

P0440 Code: Evaporative Emission Control System Malfunction – Large Leak

A P0440 is a generic powertrain code, which means it can appear in any vehicle regardless of make or model. Unlike other OBD-II codes, it will not affect the drivability...Read more

OBD-II Trouble Codes

P0014 Code: Camshaft Position B – Timing Over-Advanced or System Performance (Bank 1)

Diagnostic trouble code (DTC) P0014 is a generic powertrain code that can apply to all types of vehicles. The DTC stands for Camshaft Position B - Timing Over-Advanced or System...Read more

OBD-II Trouble Codes

P0172 Code: Fuel System Too Rich (Bank 1)

Is your Check Engine Light illuminated? Are you experiencing engine misfires? Or perhaps you’re noticing an unusual lack of engine power when you drive? While these symptoms are not exclusive...Read more

OBD-II Trouble Codes

P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

There are around 11,000 different trouble codes in the most recent OBD-II index. So what makes the P0141 code stand out from the rest? This article will cover the details,...Read more

OBD-II Trouble Codes

P0011 Code: “A” Camshaft Timing Over Advanced (Bank 1)

The P0011 is a generic OBD-II code, which means it is common across all manufacturers. But more specifically, this specific fault code can be triggered in vehicles with variable camshaft...Read more

OBD-II Trouble Codes

P0340 Code: Camshaft Position Sensor “A” Circuit Malfunction

A P0340 error code can be a serious issue that requires immediate attention, as the underlying cause can lead to engine damage the longer you continue to use the vehicle....Read more

OBD-II Trouble Codes

P0441 Code: Evaporative Emission Control System Incorrect Purge Flow

If the Check Engine Light is illuminated on your dashboard and your OBD-II scanner shows a P0441 trouble code, this means that there’s a problem with your EVAP system—or more...Read more

OBD-II Trouble Codes

P0455 Code: Evaporative Emission System Large Leak Detected

If the Check Engine Light is illuminated and it’s triggering a P0455 code on your OBD-II scan tool, you may be looking at a gas cap issue. But that’s certainly...Read more

OBD-II Trouble Codes

P0446 Code: Evaporative Emission Control System Vent Control Circuit Malfunction

OBD-II codes help you find out what is wrong with your vehicle—but if you don’t know what a specific code means, how can you address the issue? If you’re getting...Read more

OBD-II Trouble Codes

P0174 Code: System Too Lean (Cylinder Bank 2)

While the P0174 OBD-II trouble code is not manufacturer-specific and is considered a generic powertrain code, it can be more common in certain car makes than others. More specifically, a...Read more

OBD-II Trouble Codes

P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1)

There are many issues that could trigger the Check Engine Light to illuminate. However, if you use an OBD-II scanner and get a P0420 code, you may be having issues...Read more

OBD-II Trouble Codes

P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2)

Your vehicle starts belching smoke. The engine might stall, lose power, and idles roughly. Finally, the Check Engine Light switches on. When you plug the OBD-II scanner into the connector,...Read more

OBD-II Trouble Codes

P0171 Code: System Too Lean (Bank 1)

For combustion engines to function smoothly, it needs to have a mixture of 14.7 parts air to 1 part fuel (14.7:1). To maintain this, the engine control module (ECM) constantly...Read more

OBD-II Trouble Codes

P0300 Code: Random or Multiple Cylinder Misfire Detected

If you’ve got a P0300 on your hands, buckle up—you might be in for a complicated diagnostic and repair process. In terms of severity, this OBD-II code is critical and...Read more

OBD-II Trouble Codes

P0128 Code: Coolant Temperature Below Thermostat Regulating Temperature

When the check engine light pops on in your car, you immediately start to wonder what it means, and whether it’s something serious. Retrieving diagnostic trouble codes (DTCs) can help...Read more

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