P0627
PowertrainFuel Systemhigh severityFuel Pump A Control Circuit/Open
What P0627 Means
Open circuit in fuel pump control circuit.
Symptoms
- No start
- No fuel pump prime sound
- Stalling
Common Causes
- Fuel pump relay failure
- Wiring open
- PCM driver failure
- Inertia switch tripped
Diagnostic Steps
- Check fuel pump relay
- Test wiring
- Check inertia switch
- Test PCM output
Where to start: Replace relay or repair wiring.
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