P0629moderate severityPowertrain
Fuel Pump A Control Circuit High
on 2002 Chevrolet Express 6.0L V8 Vortec · RWD
What this code means
High voltage in fuel pump control circuit.
Symptoms
- Fuel pump always running
Common causes
- Short to power
- Relay stuck closed
Diagnostic steps
- Test voltage
- Check relay
- Look for shorts to power
Repair notes
Replace relay. Repair wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1