Powertrain
generic / SAE
P0231
Fuel Pump Secondary Circuit Low
The voltage on the secondary side of the fuel pump circuit is below the expected level when the pump is commanded on. Often caused by a failed pump motor, corroded ground, or wiring fault.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 31
Possible causes
- Fuel pump motor failed or worn high
- Pump ground point corroded 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: possible
- Estimated cost: 150–800 €
- Estimated time: 1–4 h
- Component: fuel pump
- Component: fuel pump wiring
- MIL / check engine light
Sources
References
sae:J2012