What does code P23C4 mean?

Q: What does code P23C4 mean?

Engine Coolant Bypass Valve C Position Sensor Circuit Low. P23C4 indicates that the powertrain control module has detected a low-voltage condition on the signal circuit of the engine coolant bypass valve position sensor for circuit C. The sensor normally reports the valve's position via a voltage that varies with valve travel, and a sustained low reading tells the module the circuit is shorted to ground or the sensor has failed.

DTC codes / P23xx · Ignition system and misfire / P23C4

P23C4Engine Coolant Bypass Valve C Position Sensor Circuit Low

P23C4 indicates that the powertrain control module has detected a low-voltage condition on the signal circuit of the engine coolant bypass valve position sensor for circuit C. The sensor normally reports the valve's position via a voltage that varies with valve travel, and a sustained low reading tells the module the circuit is shorted to ground or the sensor has failed.

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.