Common Symptoms
- Engine cranks but fails to start
- Engine stalls shortly after starting
- Intermittent no-start condition
- Check engine light illuminated
- Fuel pump does not prime when key is turned on
- Loss of power or hesitation during acceleration
Most Likely Root Causes
- Open circuit in fuel pump control wiring
- Faulty fuel pump relay
- Damaged or corroded connector at fuel pump driver module
- Failed fuel pump driver module or control module
- Blown fuse in fuel pump circuit
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Component Location
Fuel pump relay and driver module are typically located in the engine compartment fuse box or under the vehicle near the fuel tank.
Manufacturer Notes
Some vehicles use a separate fuel pump driver module rather than PCM-direct control, requiring module-specific testing procedures.
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