Powertrain
generic / SAE
P0629
Fuel Pump A Control Circuit High
The control circuit for fuel pump A reports voltage below the lower diagnostic threshold. Indicates short to ground or open winding.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 29
Possible causes
- Pump circuit shorted to power high
- Ground open medium
- Connector pins corroded - high contact resistance low
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–800 €
- Estimated time: 0.5–3 h
- Component: fuel pump
- Component: fuel pump relay
- Component: pump wiring
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012