How severe is this DTC?
Internal control module processor codes should be classified as severe. A stored P0C2F code can lead to various driving issues.
What are some symptoms of the code?
Symptoms of a P0C2F fault code may include:
- Irregular transmission shifting patterns
- Erratic, intermittent, or inaccurate drive motor/generator – reflected motor speed
- Unexpected variations in fuel consumption or battery power projections
What are some common causes of the code?
Causes
of this code may include:
- Faulty PCM or PCM programming error
- Open or shorted drive motor/generator – motor speed sensor circuits
- Defective drive motor/generator – motor speed sensor
- Open or shorted circuits or connectors in the CAN harness
- Inadequate control module ground
What are the troubleshooting steps for P0C2F?
Even for the most experienced and well-equipped professional technician, diagnosing a P0C2F code can prove very challenging. There’s also the issue of reprogramming. Without the necessary reprogramming equipment, it will be impossible to replace a faulty controller and perform a successful repair.
If ECM/PCM power codes are present, they will obviously need to be addressed before attempting to diagnose a P0C2F.
There are several preliminary tests that can be performed before declaring a controller faulty. A diagnostic scanner, digital volt/ohmmeter (DVOM), and reliable vehicle information source will be required.
Connect the scanner to the vehicle’s diagnostic port and retrieve all stored codes and freeze frame data. You’ll want to record this information, just in case the code proves to be intermittent. After recording all relevant information, clear the codes and test drive the vehicle until the code resets or the PCM enters readiness mode. If the PCM enters readiness mode, the code is intermittent and will be more difficult to diagnose. The condition that caused the P0C2F to store may even need to worsen before a diagnosis can be made. If the code resets, continue with this short list of preliminary tests.
When trying to diagnose a P0C2F, information can be your best tool. Search your vehicle information source for Technical Service Bulletins (TSBs) that correlate the stored code, vehicle (year, make, model, and engine), and presented symptoms. If you find the right TSB, it can provide diagnostic information that will significantly assist you.
Use your vehicle information source to obtain connector face views, connector pinout diagrams, component locations, wiring schematics, and diagnostic flowcharts related to the code and specific vehicle.
Use the DVOM to test controller power fuses and relays. Test and replace blown fuses as needed. Fuses should be tested with the circuit loaded.
If all fuses and relays appear to function as expected, a visual inspection of wiring and harnesses related to the controller is necessary. You’ll also want to check chassis and engine ground junctions. Use your vehicle information source to obtain ground locations for related circuits. Use the DVOM to test ground integrity.
Visually inspect system controllers for signs of water, heat, or collision damage. Any damaged controller, particularly by water, should be considered faulty.
If controller power and ground circuits are intact, suspect a faulty controller or controller programming error. Controller replacement will require reprogramming. In some cases, you can purchase pre-programmed controllers through aftermarket sources. Other vehicles/controllers will require onboard reprogramming that can only be performed by a dealership or other qualified source.
Unlike most other codes, P0C2F is likely caused by a faulty controller or controller programming error
Test system ground integrity by connecting the DVOM negative test lead to ground and the positive test lead to battery voltage
