Powertrain
generic / SAE
P00E4
Exhaust Heat Exchanger Exhaust Bypass Valve A Stuck Closed
The exhaust heat exchanger bypass valve A is stuck closed. Risk of overheating because exhaust always passes through the heat exchanger.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / E4
Possible causes
- Valve stuck closed by carbon high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 2–6 h
- Component: exhaust bypass valve a
- Component: heat exchanger
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012