What does code P23DC mean?

Q: What does code P23DC mean?

Cylinder 3 Fuel Heater Performance. P23DC indicates that the powertrain control module has detected a performance fault in the fuel heater circuit for cylinder 3, typically on diesel engines where fuel is warmed to improve combustion. The computer monitors the heater's electrical current or temperature response and sets this code when the circuit does not behave as expected during the commanded test.

DTC codes / P23xx · Ignition system and misfire / P23DC

P23DCCylinder 3 Fuel Heater Performance

P23DC indicates that the powertrain control module has detected a performance fault in the fuel heater circuit for cylinder 3, typically on diesel engines where fuel is warmed to improve combustion. The computer monitors the heater's electrical current or temperature response and sets this code when the circuit does not behave as expected during the commanded test.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

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.