P2C23
Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Performance
The position sensor for exhaust heat exchanger bypass valve A reports a performance condition. Heat recovery routing cannot be verified reliably.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor offset driftedCommon
- Linkage between sensor and valve wornPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Exhaust Heat Exchanger Bypass Valve A Pos Sensor
- Wiring Harness
- ECM
P2C23 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.