Fuel Cooler Pump Control Circuit High
The P008E code indicates that the powertrain control module (PCM) has detected a high voltage condition in the fuel cooler pump control circuit. This typically means the pump is receiving excessive voltage or the circuit has a short to power, which can cause the pump to run continuously or malfunction, potentially leading to fuel overheating and reduced engine performance.
1. Most Common Causes
- Short to battery voltage (B+) in the fuel cooler pump signal/control wiring
- Fuel cooler pump with internal short to positive
- Damaged pump connector with bent pins or corrosion bridging to 12V
- Internal failure of the output driver (low-side/high-side) within the PCM
- Wiring chafed or pinched against components carrying battery voltage
2. Symptoms You Will Notice
- Check Engine Light on
- Reduced fuel economy
- Engine performance issues
- Fuel temperature warning
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the fuel cooler pump and its wiring for damage or corrosion.
Step 3: Test the pump control circuit voltage with a multimeter; compare to manufacturer specs.
Step 4: Check for shorts to power or ground in the circuit.
Step 5: If circuit is okay, test the pump itself; replace if faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the fuel cooler pump may fail, leading to fuel overheating and potential engine damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.