OBD-II code · Powertrain (generic, extended)
P23A5 Exhaust Heat Exchanger Bypass Valve B Control Performance
Exhaust Heat Exchanger Bypass Valve B Control Performance: the component is electrically intact but its response does not match the command.
Is it safe to drive with P23A5?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFlap stuck due to soot or carbon
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Bypass Valve B
Related codes
- P237FExhaust Heat Exchanger Bypass Valve A Control Performance
- P23A2Exhaust Heat Exchanger Bypass Valve B Control Circuit Open
- P23A3Exhaust Heat Exchanger Bypass Valve B Control Circuit Low
- P23A4Exhaust Heat Exchanger Bypass Valve B Control Circuit High
- P23A6Exhaust Heat Exchanger Bypass Valve B Stuck Open
- P23A7Exhaust Heat Exchanger Bypass Valve B Stuck Closed
- P23A8Exhaust Heat Exchanger Bypass Valve B Position Sensor Stop Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.