Auxiliary Transmission Fluid Pump Control Module Internal Temperature Sensor Circuit
The P0C1C code indicates a malfunction in the internal temperature sensor circuit of the auxiliary transmission fluid pump control module. This sensor monitors the temperature of the pump's control module to prevent overheating. A fault in this circuit can lead to incorrect temperature readings, potentially causing the pump to operate inefficiently or fail, which may affect transmission cooling and performance.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission overheating or poor shifting performance
2. Most Common Causes
- Faulty internal temperature sensor in the auxiliary transmission fluid pump control module
- Damaged or deteriorated auxiliary transmission fluid pump control module
- Corroded, loose, or damaged wiring or connectors in the temperature sensor circuit
- Short to ground or voltage in the temperature sensor circuit
- Actual overheating of the control module due to inadequate ventilation or thermal dissipation failure
- Internal control module failure (damaged PCB, defective electronic components)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the wiring and connector of the auxiliary transmission fluid pump control module for damage or corrosion.
Step 3: Test the internal temperature sensor resistance using a multimeter and compare with manufacturer specifications.
Step 4: If sensor and wiring are okay, replace the auxiliary transmission fluid pump control module.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can lead to transmission overheating and potential damage. Have the vehicle inspected promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the sensor, wiring, or module needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.