What does code P23C3 mean?

Q: What does code P23C3 mean?

Engine Coolant Bypass Valve C Position Sensor Circuit. P23C3 indicates that the powertrain control module (PCM) has detected an abnormal signal from the position sensor circuit of the engine coolant bypass valve 'C'. The PCM expects a specific voltage or resistance range that corresponds to the valve's commanded position, and the actual reading falls outside that expected range, triggering the code.

DTC codes / P23xx · Ignition system and misfire / P23C3

P23C3Engine Coolant Bypass Valve C Position Sensor Circuit

P23C3 indicates that the powertrain control module (PCM) has detected an abnormal signal from the position sensor circuit of the engine coolant bypass valve 'C'. The PCM expects a specific voltage or resistance range that corresponds to the valve's commanded position, and the actual reading falls outside that expected range, triggering the code.

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.