Get the app
Quick access from your home screen.
DTC codes / P23xx · Ignition system and misfire / P233F
P233F indicates that the powertrain control module has detected an abnormally high voltage on the supply control circuit for the fuel pressure regulator B solenoid, which is usually a ground-controlled output. The computer expects to pull this circuit low when energizing the solenoid, but it sees voltage staying high or rising when it should not, so it flags the circuit as faulty.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
Get the app
Quick access from your home screen.