What does code P23CC mean?

Q: What does code P23CC mean?

Fuel Rail Heater Control Circuit High. P23CC indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel rail heater control circuit, which typically points to an open circuit, a short to voltage, or a failed heater element. The PCM commands the heater on or off based on temperature and engine conditions, and it monitors the circuit for expected voltage; when the voltage stays above the calibrated threshold, it stores this code and may disable the heater.

DTC codes / P23xx · Ignition system and misfire / P23CC

P23CCFuel Rail Heater Control Circuit High

P23CC indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel rail heater control circuit, which typically points to an open circuit, a short to voltage, or a failed heater element. The PCM commands the heater on or off based on temperature and engine conditions, and it monitors the circuit for expected voltage; when the voltage stays above the calibrated threshold, it stores this code and may disable the heater.

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.