Fault code P0C2F – internal control module drive motor/generator – engine speed sensor performance

Fault code P0C2F is called “Internal Control Module Drive Motor/Generator – Engine Speed Sensor Performance” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P0C2F

Stored code P0C2F means that the powertrain control module (PCM) has detected an internal performance error. Related to the drive motor speed sensor circuit.

Fault code P0C2F – internal control module drive motor/generator – engine speed sensor performance

When monitoring the internal control module, various controller self-test functions are performed. The control system input and output signals are self-tested and monitored continuously by the PCM.

The drive motor speed sensor is an electromagnet that interacts with a toothed ring attached to the drive motor shaft. Running in close proximity to the sensor, notches in the ring create interruptions in the electromagnetic sensor circuit.

These interruptions are received by the PCM as waveform patterns. The faster the waveform patterns are input to the controller, the higher the estimated speed of the drive motor. If the input waveform is generated slowly, the motor speed estimate perceived by the controller decreases.

If the PCM detects an internal mismatch between the drive motor and the motor speed sensor system processor. Then the P0C2F code will be stored, and the malfunction indicator lamp (MIL) may illuminate.

The P0C2F diagnosis code applies only to electric and hybrid vehicles.

Symptoms of vehicle malfunctions

The main signal that an error P0C2F has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. The “Check engine” control lamp on the control panel will light up (the code will be written in the memory as a fault).
  2. Unstable gear shifting patterns.
  3. Erroneous, intermittent, or inaccurate reflection of drive engine speed.
  4. Deviations in fuel consumption or predicted battery power.

The internal control module processor code should be categorized as serious. Causes causing the error P0C2F to persist may cause various driving problems.

Factors that can cause this error code

The error code P0C2F can mean that one or more of the following problems have occurred:

  • Defective drive motor.
  • Drive motor speed sensor circuits are open or short-circuited.
  • Short circuit or open circuit in CAN circuit or connectors.
  • Poor grounding of the control module.
  • Sometimes the cause is a faulty PCM module.

How to fix or reset OBD-2 code P0C2F

Some suggested steps for troubleshooting and fix the error code P0C2F:

  1. Read all stored errors with an OBD-II scan tool.
  2. Clear the errors and perform a test drive to find out if error P0C2F appears again.
  3. If the code appears again, inspect the wires and connectors for damage.
  4. Test the drive motor speed sensor circuit; if there is a problem, replace the faulty sensor.
  5. Inspect the electrical wiring and connections of the associated sensors.
  6. If necessary, flash or replace PCM.

Diagnose and repair of problems

To correct the P0C2F code, the most common solution is to replace and reprogram the PCM. Although, faulty wiring should also be considered as a cause of this error.

Perform a thorough visual inspection of all the points where the wiring is bolted to the body. These points represent ground connections. You will often find loose connections or even ground wires that hang down after any repairs have been made.

If bad ground connections have been found and repaired, remove all codes and re-scan the system to see if any codes return. In some cases it may be necessary to re-integrate or even reprogram some controllers after a communication failure.

If all ground connections are secure, perform a thorough visual inspection of all wiring on the vehicle. Note that this inspection may require the removal of the dashboard, seats, carpets, and even trim panels to gain access to all wiring harnesses.

If no wiring damage is found, but the P0C2F code remains despite following the above steps. One option may be to replace the entire electrical harness. However, this will not solve the problem because the problem may be related to the controller.

Typical problems with controllers include faulty drivers, memory failure, or other components for any number of reasons. For this reason, replacing the entire harness is not recommended. Until exhaustive diagnostic tests have been performed on all controllers, including the PCM.

Checking and reprogramming

If the PCM has recently been replaced, there is a good chance that it has been improperly programmed or not programmed at all. In addition, you cannot use a controller from another vehicle. Unless it has been reprogrammed specifically for the vehicle in question.

Aftermarket (high performance) firmware may not be recognized by other controllers, causing P0C2F to persist.

Improperly programmed or replaced controllers may be reprogrammed by the factory scanner. If you cannot access such a scanner, most dealerships offer PCM programming for a nominal fee.

Some aftermarket PCM manufacturers offer preprogrammed controllers for certain models. Contact your auto parts supplier and get the vehicle identification number, mileage, and other pertinent data.

On which vehicles does this problem occur most frequently

Fault code P0C2F can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • BMW
  • Chevrolet
  • Ford
  • Nissan
  • Tesla
  • Toyota

Fault code P0C2F can sometimes be found with other errors. The most common are the following: P0C1B, P0C23, P0C2B, P0C47, P0C73.

Video

Rate article
AutoNevod | Technical description of OBD-2 car faults and their solution
Add a comment