What does code P233C mean?

Q: What does code P233C mean?

Fuel Pressure Regulator C Control Circuit High. P233C indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for fuel pressure regulator C, which is one of several regulators used in some fuel systems. The PCM commands a duty cycle to the regulator solenoid, and the feedback circuit reports a voltage above the expected range, signaling an open circuit, short to power, or a failed regulator.

DTC codes / P23xx · Ignition system and misfire / P233C

P233CFuel Pressure Regulator C Control Circuit High

P233C indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for fuel pressure regulator C, which is one of several regulators used in some fuel systems. The PCM commands a duty cycle to the regulator solenoid, and the feedback circuit reports a voltage above the expected range, signaling an open circuit, short to power, or a failed 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.