OBD-II code · Powertrain (generic, extended)
P233E Fuel Pressure Regulator B Solenoid Supply Voltage Control Circuit Low
The supply line that powers the solenoid of fuel pressure regulator B is below the expected voltage with the regulator commanded active - typically a high-resistance feed, partial short to ground or weak relay contact.
Is it safe to drive with P233E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply feed has high contact resistance
- PossiblePartial short to ground on supply line
- 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
- P00C9Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit Low
- P233BFuel Pressure Regulator C Control Circuit Low
- P233CFuel Pressure Regulator C Control Circuit High
- P233DFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit Open
- P233FFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit High
- P2340Cylinder 5 Above Knock Threshold
- P2341Cylinder 6 Above Knock Threshold
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.