What does code P233B mean?

Q: What does code P233B mean?

Fuel Pressure Regulator C Control Circuit Low. P233B indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for fuel pressure regulator C, which is typically the third regulator in a multi-regulator fuel system. The PCM commands a specific current or voltage to the regulator solenoid, and the feedback signal on the control circuit falls below the expected threshold, signaling an open circuit, short to ground, or faulty regulator.

DTC codes / P23xx · Ignition system and misfire / P233B

P233BFuel Pressure Regulator C Control Circuit Low

P233B indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for fuel pressure regulator C, which is typically the third regulator in a multi-regulator fuel system. The PCM commands a specific current or voltage to the regulator solenoid, and the feedback signal on the control circuit falls below the expected threshold, signaling an open circuit, short to ground, or faulty regulator.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.