What does code P23C8 mean?

Q: What does code P23C8 mean?

Fuel Heater Control Module Power Control Circuit Low. P23C8 indicates that the fuel heater control module has detected a low-voltage condition on its power control circuit, meaning the module is not receiving the voltage it expects to operate the fuel heater. The engine control module (ECM) sets this code when the circuit voltage falls below the calibrated threshold, which can prevent the fuel heater from functioning in cold conditions.

DTC codes / P23xx · Ignition system and misfire / P23C8

P23C8Fuel Heater Control Module Power Control Circuit Low

P23C8 indicates that the fuel heater control module has detected a low-voltage condition on its power control circuit, meaning the module is not receiving the voltage it expects to operate the fuel heater. The engine control module (ECM) sets this code when the circuit voltage falls below the calibrated threshold, which can prevent the fuel heater from functioning in cold conditions.

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.