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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Fuel pressure regulator b
- Regulator b supply relay
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Supply line shorted to a higher voltage rail
- Supply relay contact welded closed
- Connector pins corroded - high contact resistance
Possible 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
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.