What does code P23A7 mean?

Q: What does code P23A7 mean?

Exhaust Heat Exchanger Bypass Valve B Stuck Closed. P23A7 indicates that the powertrain control module (PCM) has commanded the exhaust heat exchanger bypass valve B to change position, but the valve remains stuck in the closed position. The PCM detects this by comparing the commanded state to feedback from the valve position sensor or by monitoring the electrical circuit for abnormal current draw.

DTC codes / P23xx · Ignition system and misfire / P23A7

P23A7Exhaust Heat Exchanger Bypass Valve B Stuck Closed

P23A7 indicates that the powertrain control module (PCM) has commanded the exhaust heat exchanger bypass valve B to change position, but the valve remains stuck in the closed position. The PCM detects this by comparing the commanded state to feedback from the valve position sensor or by monitoring the electrical circuit for abnormal current draw.

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.