Fuel Cooler Pump Control Circuit Open
The P008C code indicates that the powertrain control module (PCM) has detected an open circuit in the fuel cooler pump control circuit. This typically means there is a break in the electrical path between the PCM and the fuel cooler pump, preventing the pump from operating. The fuel cooler pump helps maintain optimal fuel temperature, and an open circuit can lead to reduced engine performance and increased emissions.
1. Most Common Causes
- Blown fuse for the fuel cooler pump circuit
- Faulty fuel cooler pump relay
- Open or shorted wiring in the control circuit
- Failed fuel cooler pump motor
- Corroded or loose electrical connectors
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Engine performance issues (hesitation, stalling)
- Fuel temperature warning light (if equipped)
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the fuel cooler pump fuse and relay; replace if blown or faulty.
Step 3: Check wiring and connectors for damage, corrosion, or loose connections; repair as needed.
Step 4: Test the fuel cooler pump by applying direct battery voltage; if it doesn't run, replace the pump.
Step 5: If pump runs, check for continuity and voltage at the PCM connector; repair open circuit.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause reduced engine performance and potential damage to the fuel system due to overheating.
How much does it cost to fix?▼
The cost to fix P008C typically ranges from $50 to $150 for parts and labor, depending on the root cause (e.g., fuse, relay, wiring repair, or pump replacement).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.