Warning signs the Fuel Pump Control Module is failing:
- Engine stalling or hesitation, especially under load
- Difficulty starting the engine
- Reduced fuel economy
- Check Engine Light illuminated
- Fuel pump not activating
- Vehicle running rough or misfiring
How to test if this part is the problem:
- Check the fuel pump relay and fuse. Make sure they are working correctly.
- Use a scan tool to check for diagnostic trouble codes (DTCs) related to the fuel system.
- Test the voltage and ground connections to the fuel pump control module.
- If possible, swap the fuel pump control module with a known good one to see if the problem goes away. This is best done by a professional.
Common failure causes for this part:
- Overheating due to its location near the fuel tank or exhaust system
- Corrosion from exposure to road salt and moisture
- Electrical surges or shorts in the fuel pump circuit
- Vibration and mechanical stress over time
- General wear and tear