OBD-II code · Powertrain (generic, extended)
P233F Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit High
Same as P233D but with the supply line shorted to a higher potential than expected, so the ECU measures more voltage on the regulator B feed than the commanded level allows.
Is it safe to drive with P233F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply line shorted to a higher voltage rail
- Less likelySupply relay contact welded closed
- 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
- Often, with basic tools
- Typical labour
- 0.6–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pressure Regulator B, Regulator B Supply Relay
Related codes
- P00CAFuel Pressure Regulator A Solenoid Supply Voltage Control Circuit High
- P233CFuel Pressure Regulator C Control Circuit High
- P233DFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit Open
- P233EFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit Low
- P2340Cylinder 5 Above Knock Threshold
- P2341Cylinder 6 Above Knock Threshold
- P2342Cylinder 7 Above Knock Threshold
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.