OBD-II code · Powertrain (generic)
P0628 Fuel Pump A Control Circuit Low
Fuel Pump A Control Circuit Low: the control-circuit voltage is below the expected range. Often a short to ground or high resistance in the wiring.
Is it safe to drive with P0628?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPump circuit shorted to ground
- PossiblePump relay defective
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pump, Fuel Pump Relay, Pump Wiring
Related codes
- P0230Fuel Pump Primary Circuit Malfunction
- P0231Fuel Pump Secondary Circuit Low
- P0232Fuel Pump Secondary Circuit High
- P0629Fuel Pump A Control Circuit High
- P2633Fuel Pump B Control Circuit Low
- P0625Generator Field Terminal Circuit Low
- P0626Generator Field/F Terminal Circuit Performance
- P0627Fuel Pump "A" Control Circuit Open
- P062AFuel Pump A Control Circuit Range or Performance
- P062BInternal Control Module Fuel Injector Control Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.