P0628
PPowertrainFuel Pump A Control Circuit Low
What does this code mean?
Severity : HighP0628 indicates low voltage in the fuel pump A control circuit. The engine control module drives the pump, directly or through a relay or module, and monitors this circuit. A low voltage usually means a short to ground, and the pump may stop working.
Symptoms
- Check engine light on.
- Hard start or no start.
- Stalling while driving.
- Loss of power under acceleration.
Possible causes
- Control wiring shorted to ground.
- Faulty fuel pump relay or module.
- Corroded or damaged connector.
- Faulty fuel pump.
- Engine control module fault, which is rare.
Diagnosis and repair
- Check the fuel pump fuse and relay.
- Inspect wiring and connectors to the tank.
- Check the control circuit for a short to ground with a multimeter.
- Measure fuel pressure.
- Repair the wiring or replace the faulty part, clear the code and road test.
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Code
P0628
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012