Powertrain
generic / SAE
P237F
Exhaust Heat Exchanger Bypass Valve A Control Performance
The bypass flap A of the exhaust heat exchanger does not move as commanded - the position feedback or downstream temperature does not respond to the control demand. The flap is mechanically stuck, the actuator gearing is worn, or the position sensor is offset.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 7F
Possible causes
- Flap stuck due to soot or carbon deposits high
- Actuator gearing worn or slipping medium
- Position sensor offset against actual flap angle low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 250–1200 €
- Estimated time: 1.5–4 h
- Component: exhaust bypass valve a
- Component: exhaust bypass position sensor a
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012