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 circuit is responsible for controlling the fuel cooler pump, which helps maintain optimal fuel temperature by circulating fuel through a cooler. A high voltage reading typically suggests a short to power, a faulty pump, or a wiring issue. This can lead to reduced fuel system performance and potential engine drivability problems.
01. Most Common Causes
- Faulty fuel cooler pump
- Short to power in the control circuit wiring
- Damaged connector or corroded terminals
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Engine performance issues (hesitation, stalling)
- Fuel temperature warning light (if equipped)
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the fuel cooler pump and its wiring harness for damage, corrosion, or loose connections.
Step 3: Test the fuel cooler pump circuit for voltage and ground integrity using a multimeter.
Step 4: If circuit tests are normal, test the fuel cooler pump resistance and operation per manufacturer specifications.
Step 5: If pump and circuit are okay, check for a short to power in the control circuit or a faulty PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause poor engine performance and potential damage to the fuel system. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost to fix P008E typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause. Replacement of the fuel cooler pump may cost more.