What does code P23E8 mean?

Q: What does code P23E8 mean?

EGR C Flow Excessive Detected. P23E8 means the engine computer has detected more exhaust gas recirculation (EGR) flow than it commanded, based on its flow model or sensor feedback. The powertrain control module (PCM) expects a certain EGR rate for the current operating conditions, and the measured or inferred flow exceeds that target, so it flags excessive EGR flow.

DTC codes / P23xx · Ignition system and misfire / P23E8

P23E8EGR C Flow Excessive Detected

P23E8 means the engine computer has detected more exhaust gas recirculation (EGR) flow than it commanded, based on its flow model or sensor feedback. The powertrain control module (PCM) expects a certain EGR rate for the current operating conditions, and the measured or inferred flow exceeds that target, so it flags excessive EGR flow.

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.