What does code P23E1 mean?

Q: What does code P23E1 mean?

EGR C Control Circuit Open. P23E1 indicates that the engine control module (ECM) has detected an open circuit in the control circuit for the exhaust gas recirculation (EGR) valve 'C'. This means the electrical path that commands the valve to open or close is broken, so the ECM cannot reliably operate that EGR valve. The code is set when the ECM sees voltage outside the expected range on the control wire, typically indicating a break in the wire, a failed connector, or a faulty valve solenoid.

DTC codes / P23xx · Ignition system and misfire / P23E1

P23E1EGR C Control Circuit Open

P23E1 indicates that the engine control module (ECM) has detected an open circuit in the control circuit for the exhaust gas recirculation (EGR) valve 'C'. This means the electrical path that commands the valve to open or close is broken, so the ECM cannot reliably operate that EGR valve. The code is set when the ECM sees voltage outside the expected range on the control wire, typically indicating a break in the wire, a failed connector, or a faulty valve solenoid.

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.