P0628
PowertrainFuel Systemhigh severityFuel Pump A Control Circuit Low
What P0628 Means
Low voltage in fuel pump control circuit.
Symptoms
- No start
- Weak fuel pump
Common Causes
- Short to ground
- Corroded wiring
- Bad relay
Diagnostic Steps
- Test voltage
- Check for shorts
- Test relay
Where to start: Repair wiring or replace relay.
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