P0602 Code: Control Module Programming Error

The powertrain control module (PCM) is the computer that’s in charge of governing engine and transmission operation. It makes sure that the various parts in powertrain-related systems, like the fuel system and the ignition system, are running and working together properly.

To make sure it is operating correctly, the PCM runs a diagnosis of itself at regular intervals. If it finds an internal programming error, it will log a P0602 code.

What Does the P0602 Code Mean?

Diagnostic trouble code (DTC) P0602 stands for “Control Module Programming Error.”

The PCM’s electronically erasable programmable read-only memory (EEPROM) stores the settings for engine and transmission management for the vehicle. Using these settings, the computer runs the engine at the manufacturer-designed efficiency and performance. It also identifies and works with other control modules.

When the PCM spots an internal programming error that applies to itself, it will set the powertrain code P0602 code. These errors include deviations with the EEPROM or an inability to recognize the program stored inside the memory.

Note: The definition of code P0602 might differ according to the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0602 Code?

• PCM software issue
• Faulty PCM
• Wiring problem

What are the Common Symptoms of the P0602 Code?

• Illuminated check engine light
• Reduced engine performance
• Engine fails to start
• Engine stalls

How to Diagnose the P0602 Code

The P0602 code is a generic trouble code, which means it applies to various vehicles that comply with the OBD-II standard. While vehicles that logged this code can exhibit similar symptoms, that doesn’t mean that they share the same steps for diagnosis. The process can vary between different makes and models.

If you’re not confident about conducting diagnostic tests on your vehicle, it’s best to leave the job to a certified mechanic. Otherwise, you can go ahead and diagnose the issue yourself. Check out this video to get an idea of what the process might involve.

How to Fix the P0602 Code

It’s possible to reprogram controllers and PCMs and resolve the P0602 code. However, if the PCM fails, it will need replacement.

Attempting to fix a P0602 code can become a frustrating task if you don’t have the right tools and know-how. If you’re not confident with your automotive know-how and DIY skills, it’s best to leave the job to a licensed mechanic.

Otherwise, you can address the problem yourself. Make sure you have everything you need and consult a vehicle-specific repair manual or online repair database before you get started.

Get a Replacement PCM that Fits Your Car

If a faulty PCM is triggering DTC P0602, it is also likely triggering other trouble codes. The PCM is your vehicle’s central computer system. It connects to various other sensors and systems to keep the vehicle running properly. You need to replace or repair a faulty PCM as soon as possible or your vehicle might stop functioning. Don’t worry. You can turn to CarParts.com to find a new PCM that fits your vehicle.

The CarParts.com website has a built-in vehicle selector to make browsing our vast catalog simple and easy. Just input your vehicle’s make and model to view parts that we guarantee will fit your vehicle perfectly. From there, simply choose the PCM you want and proceed through our secure and convenient checkout.

You won’t be able to drive safely until you replace your vehicle’s faulty PCM. Order a new powertrain control module from CarParts.com now.