Shop Parts keyboard_double_arrow_right
Need car parts? Select your vehicle
Reading Time: 5 minutes
Summary
  • Diagnostic trouble code (DTC) P0562 stands for “System Voltage Low.” This means that the powertrain control module (PCM) detects voltage supply drops from the calibrated threshold for certain periods of time.
  • Some common causes of the P0562 include a faulty alternator or voltage regulator, loose or corroded alternator wiring, and high resistance in battery cables.
  • The symptoms commonly accompanying code P0562 include electrical components not functioning properly, engine operation stopping intermittently, and the engine not starting at all.

If your scan tool registers a code P0562 after connecting it to the OBD-II port, this means that your system is lacking voltage supply. But what could be causing this? Read on to learn more about what this code means, what its possible causes are, as well as the accompanying symptoms you can watch out for.

checking battery voltage
Code P0562 is triggered when the PCM detects voltage supply drops from the calibrated threshold for certain periods of time.

What Does the P0562 Code Mean?

Diagnostic Trouble Code (DTC) P0562 stands for “System Voltage Low.” It is triggered when the PCM detects voltage supply drops from the calibrated threshold for certain periods of time.

All electrical components in your car need a power source in order to work. When the engine is off, the battery is responsible for supplying the car with the electrical current it needs to power certain functions.

Once the engine is started, the alternator takes over. Its main job is to maintain the ideal supply level, which is typically within 13.5 to 15.0 volts. The voltage supply may vary depending on the operating state of the engine, whether the car is idling or running, as well as the number of electrical components switched on.

See also  Underhood Checks

When the engine is off, there should be at least 12.4 volts in the system. If the car is running, there should be around 13.5 to 15.0 volts being supplied to the battery.

If the PCM detects an irregular drop in the voltage supply, code P0562 will be activated.

Electrical Supply Is Key

Every module on a vehicle has power and ground feeds, and the innards of these modules need a certain amount of voltage to do what they do. If system voltage drops below a certain programmed threshold, they either stop working or stop working right. For just one example, on a Ford, if the cranking of the starter pulls system voltage below about 7.5 volts, the engine may seem to be spinning normally but it won’t start because the PCM won’t fire the injectors.

Every module on a vehicle has power and ground feeds, and the innards of these modules need a certain amount of voltage to do what they do. If system voltage drops below a certain programmed threshold, they either stop working or stop working right.

– Richard McCuistian, ASE Certified Master Automobile Technician

Other modules may respond by simply not doing what they’re designed to do. That’s why system voltage is important enough to be monitored closely, not only by the PCM, but by all the electronics, and just about every module will have a dedicated code for insufficient system voltage.

What are the Possible Causes of the P0562 Code?

When looking for ways on how to fix the P0562 code, it would be better for you to know more about its possible causes first. Knowing the cause can make it easier for you to troubleshoot.

See also  Charging Systems

The potential causes of the P0562 code may vary according to the make and model of your vehicle. Here are the most common issues that can cause the activation of code P0562:

car alternator
One of the possible causes of code P0562 is a faulty alternator.

What are the Common Symptoms of the P0562 Code?

The symptoms you could experience may also differ depending on your vehicle. Nonetheless, below are some of the most common signs you may encounter if your vehicle’s PCM has set the code P0562:

  • Electrical components may not function properly
  • Engine operation may stop from time to time (as the voltage continues to drop)
  • Engine won’t start
  • Charging battery light on your dash will light up
  • Decreased engine performance

How to Diagnose the P0562 Code

Before you can attempt to fix the P0562 code on your car, you need to figure out exactly what triggered it in the first place. That might prove to be difficult considering how many possible reasons there are. This is why it is best to leave the diagnosis to an expert mechanic.

charge car battery light
The charging battery light may illuminate if your vehicle’s PCM has set the code P0562.

How to Fix the P0562 Code

Resolving the P0562 code can be challenging. Again, your best bet to get rid of the error code is to have a professional do the job for you.

However, if you feel like you have the necessary skills and tools to perform the repair yourself, keep in mind that there is no silver bullet for the P0562 code⁠—as with most other OBD-II codes you may encounter. Different causes will require different fixes, so make sure to diagnose the issue properly.

For example, in certain Dodge vehicles, a common fix for a P0562 code is to replace the battery⁠—provided that the underlying cause was a bad battery, of course.

See also  The Starting System

When performing any DIY repair or replacement job on your car, remember to use online auto repair resources to ensure that you are guided accordingly. You can also get a single-vehicle ALLDATA subscription, which is a great investment for anyone looking to do all their future car repairs.

As always, remember to check your owner’s manual before working on your car.

Where to Get Replacement Parts to Clear Code P0562

Engine issues are the last thing any car owner wants to deal with. They’re head-scratching and potentially expensive problems that can be difficult to deal with. As such, if your vehicle has set a P0562 code, don’t put off resolving it. Whether you need to replace a faulty alternator or a worn-out car battery, CarParts.com has what you need.

To start shopping for replacement parts, input your ride’s details into our vehicle selector to check out compatible parts. Afterward, use the search filters to customize the results based on your needs.

All our parts come from trusted names in the industry. Each item in our catalog is handpicked by our team of experts to ensure quality and functionality. They also come with a low-price guarantee and lifetime replacement to give you the best value for your money.

Shop for high-quality replacement parts at CarParts.com to clear this trouble code in no time!

Products Mentioned in this Guide

About The Authors
Written By Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

File Under : OBD-II Trouble Codes Tagged With : ,
NTMS Star
Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments

View all Questions & Answers

expand_more
CarParts.com Answers BE PART OF OUR COMMUNITY: Share your knowledge & help fellow drivers Join Now