What does code P237E mean?

Q: What does code P237E mean?

Exhaust Heat Exchanger Bypass Valve A Control Circuit High. P237E indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the exhaust heat exchanger bypass valve 'A'. This valve routes exhaust gas around the heat exchanger to manage exhaust temperature and cabin heating, and a high-voltage reading typically points to an open circuit, a short to voltage, or a failed valve actuator.

DTC codes / P23xx · Ignition system and misfire / P237E

P237EExhaust Heat Exchanger Bypass Valve A Control Circuit High

P237E indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the exhaust heat exchanger bypass valve 'A'. This valve routes exhaust gas around the heat exchanger to manage exhaust temperature and cabin heating, and a high-voltage reading typically points to an open circuit, a short to voltage, or a failed valve actuator.

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.