What does code P23D8 mean?

Q: What does code P23D8 mean?

Cylinder 2 Fuel Heater Performance. P23D8 indicates that the powertrain control module (PCM) has detected a performance fault in the fuel heater circuit for cylinder 2, meaning the heater is not raising fuel temperature as expected during cold starts or low ambient conditions. The PCM monitors the heater's electrical current and the resulting temperature change, and it sets this code when the response falls outside the calibrated range.

DTC codes / P23xx · Ignition system and misfire / P23D8

P23D8Cylinder 2 Fuel Heater Performance

P23D8 indicates that the powertrain control module (PCM) has detected a performance fault in the fuel heater circuit for cylinder 2, meaning the heater is not raising fuel temperature as expected during cold starts or low ambient conditions. The PCM monitors the heater's electrical current and the resulting temperature change, and it sets this code when the response falls outside the calibrated range.

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.