P0602 - OBD Trouble Code

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When does a programming error occur in your system? What is OBD P0602 error code? The PCM stores the P0602 error code which indicates an error in the transmission control module, the anti-lock brake control module, the anti-theft module, the body control module, the climate control module, the cruise control module, the fuel injection control module, the instrument panel control module, proximity alert module, the traction control module, as well as the turbo control module. Other trouble codes are P0601, P0603, P0604, and P0605.

A problem in the control module in addition to the programming error in one of the modules is a P0602 error code. The mechanic knows that the vehicle needs multiple drive cycles, before the check engine light is illuminated, through the PCM stores the error code during the first occurrence.

What causes this problem with the Control Module Programming Error?

• Error in the PCM programming.
• The PCM is either new or incorrect.
• High performing PCM program is installed.
• ECM/PCM has a blown fuse.
• The power supply relay of ECM/PCM is very bad.
• ECM/PCM is damaged.
• There is an opening or short circuit in the CAN harness.
• The ground wire is broken or the ground strap of the control module is uncertain.

1. Powertrain Control Module - One of the common errors in most of the vehicle is the faulty PCM. Repair/ replace the damaged PCM instantly.
2. Transmission Control Module - Any damage in the wiring system can cause trouble to this component. Get them replaced with the right replacement part from Parts Avatar.
3. Brake Control Module - if the brake control module does not work properly, it will malfunction. Repair the faulty component immediately.
4. Fuel Injection Control Module - If the transmission control module is overheated it can cause trouble to your vehicle. Fix for errors or damages.
5. Turbo Control Module - any error in the vehicle can also cause trouble to your turbo control module. Check for codes and fix the issues.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0602 here:

Common Symptoms

• Start condition is unavailable.
• Occurrence of multiple driving issues.
• The automatic transmission shifting is erratic or very harsh.
• The fuel efficiency is reduced.
• The engine may stand still or idle roughly.

Want to correct the Trouble Code P0602? Read these points mentioned below:

• If you come across any faulty, defective, damaged wires, connectors or components replace them immediately. The mechanic has to ensure that the connectors of the vehicle are properly connected.
• Once you test the individual control modules, replace them if you find any damages in the component.
• Replace the faulty/ damaged PCM.

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Visually check all the components like connectors, wires and see if there are any loose connections, defectives or faults.
• Recover every trouble code and download the freeze frame data. This information can help you when you have to define the order in which the diagnostic trouble codes were stored in the system.
• Now the mechanic has to clear the codes and test drive to see if the codes appear again.
• Upon the returning of the error code, the mechanic has to connect a special scanner in order to find out the cause of the code that is stored in the vehicle quickly. Else, the process of diagnosis will become time consuming and too costly for the mechanic. The mechanic will have to check for circuitry issues as the vehicle is in operation in order to get good results.
• The mechanic will take measure of inserting any memory device or he will risk by reprogramming the PCM as well as other control modules if a probe is inappropriate.
• Now test for the continuity and ground with the help of battery and all of its associated control modules by using the digital volt/ohmmeter, ensuring to use an auxiliary ground cable.
• With the help of a CAN bus wiring diagram, check for the continuity between each of the individual control modules.
• As a final step, you have to clear the codes and test the vehicle to see if the codes return again.

Common Mistakes When Diagnosing the P0602 Code

Some of the common mistakes while you diagnose a P0602 trouble code will include mistaking other trouble codes like dealing with engine misfires, lean exhaust, or the fuel injector as the reason for the error code in vehicle. If you do not properly diagnose it can become unsuccessful where the error code may return again. The misdiagnosis can be avoided by repairing the damaged part and clearing the diagnostic trouble codes where they are stored in the PCM.