Warning Signs of a Failing Fuel Pump Control Module
- Engine stalls or hesitates, especially under acceleration
- Difficulty starting the engine
- Reduced fuel efficiency
- Check Engine Light is on
- Fuel pump runs constantly or not at all
- Erratic fuel gauge readings
Testing the Fuel Pump Control Module
It's important to make sure the fuel pump control module is the problem before replacing it. Here's how to check:
- Check the fuel pump relay: A faulty relay can mimic a bad control module.
- Inspect the wiring: Look for damaged or corroded wires leading to the module and fuel pump.
- Test the fuel pump: Make sure the fuel pump itself is working.
- Use a diagnostic scanner: A scanner can read codes related to the fuel pump control module.
Common Failure Causes
- Overheating: The module can overheat due to its location or a failing fuel pump.
- Corrosion: Moisture and road salt can corrode the module's connections.
- Electrical surges: Power surges can damage the module's internal components.
- Fuel pump failure: A failing fuel pump can put extra strain on the module, causing it to fail prematurely.