Fuel Cooler Pump Control Circuit Low
The P008D code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the fuel cooler pump control circuit. This circuit is responsible for activating the fuel cooler pump, which helps cool the fuel returning to the tank, reducing fuel temperature and preventing vapor lock. A low voltage signal suggests a short to ground, open circuit, or faulty component in the pump control circuit.
01. Most Common Causes
- Faulty fuel cooler pump
- Open or shorted wiring in the pump control circuit
- Blown fuse or relay for the fuel cooler pump
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Increased fuel temperature
- Possible reduced engine performance or fuel economy
- In some cases, no noticeable drivability issues
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for additional codes.
Step 2: Visually inspect the fuel cooler pump and its wiring for damage, corrosion, or loose connections.
Step 3: Test the fuel cooler pump circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: Check the fuse and relay for the fuel cooler pump; replace if blown.
Step 5: If circuit is intact, test the pump itself by applying direct battery voltage; replace if it does not operate.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but prolonged driving may lead to higher fuel temperatures, potentially causing vapor lock or reduced performance. It is recommended to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on whether the issue is a simple fuse replacement or a pump replacement.