OBD-II code · Powertrain (generic, extended)
P237F Exhaust Heat Exchanger Bypass Valve A Control Performance
Exhaust Heat Exchanger Bypass Valve A Control Performance: the component is electrically intact but its response does not match the command.
Is it safe to drive with P237F?
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 deposits
- PossibleActuator gearing worn or slipping
- Less likelyPosition sensor offset against actual flap angle
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 A, Exhaust Bypass Position Sensor A
Related codes
- P23A5Exhaust Heat Exchanger Bypass Valve B Control Performance
- P237CExhaust Heat Exchanger Bypass Valve A Control Circuit Open
- P237DExhaust Heat Exchanger Bypass Valve A Control Circuit Low
- P237EExhaust Heat Exchanger Bypass Valve A Control Circuit High
- P2380Wait to Start Lamp Control Circuit
- P2381EGR Sensor D Circuit High
- P2382EGR Sensor D Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.