What does code P23E4 mean?

Q: What does code P23E4 mean?

EGR C Control Circuit High. P23E4 indicates that the engine computer has detected an abnormally high voltage on the control circuit for the EGR (exhaust gas recirculation) valve 'C'. This typically means the circuit is shorted to power, the valve's internal actuator has failed, or the computer's driver is faulty, preventing proper EGR flow control.

DTC codes / P23xx · Ignition system and misfire / P23E4

P23E4EGR C Control Circuit High

P23E4 indicates that the engine computer has detected an abnormally high voltage on the control circuit for the EGR (exhaust gas recirculation) valve 'C'. This typically means the circuit is shorted to power, the valve's internal actuator has failed, or the computer's driver is faulty, preventing proper EGR flow control.

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.

Reading P23E4

PPowertrain: engine, transmission and emissions.

2Generic (SAE) code: it means the same thing on every OBD-II vehicle.

3Ignition system and misfire.

E4The exact fault within that area.

Often seen with

P0401 EGR Flow Insufficient Detected
P0402 EGR Flow Excessive Detected
P0403 EGR Circuit Malfunction
P0404 EGR Circuit Range/Performance
P0405 EGR Sensor A Circuit Low

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