Fuel Pressure Regulator C Control Circuit High
Same as P233A but with the control line shorted to supply - the ECU measures a high voltage that does not match the commanded duty cycle.
Affected components
- Fuel pressure regulator c
- Fuel rail
Common causes
- High likelihood: Control line shorted to battery or supply
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
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
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.