Auxiliary Transmission Fluid Pump Control Module Feedback Signal High
The P0C2E code indicates that the Auxiliary Transmission Fluid Pump (ATFP) control module is receiving a feedback signal voltage higher than the expected range. This pump is typically used in hybrid or start-stop vehicles to maintain transmission fluid pressure when the engine is off. The high signal may be due to a faulty pump control module, wiring issues, or a malfunctioning pump motor.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission shifting issues or harsh engagement
- Possible transmission overheating or reduced fuel economy
2. Most Common Causes
- Faulty auxiliary transmission fluid pump control module
- Short to voltage in the feedback signal circuit
- Damaged auxiliary transmission fluid pump motor
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Inspect the auxiliary transmission fluid pump and its wiring for damage, corrosion, or loose connections.
Step 3: Test the feedback signal circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: If wiring is okay, test the pump control module and pump motor per service manual procedures.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the auxiliary pump failure can lead to transmission damage, especially in stop-and-go traffic.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repair costs vary; replacing the pump control module or pump can range from $200-$800 depending on the vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.