Powertrain
generic / SAE
P2261
Turbo/Super Charger Bypass Valve Mechanical
The ECU detects a mechanical fault in the turbocharger or supercharger bypass valve. The valve does not open or close as commanded, causing boost-pressure errors and reduced engine response.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 61
Possible causes
- Stuck bypass valve high
- Leak in vacuum/pressure actuator medium
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 150–700 €
- Estimated time: 0.5–2.5 h
- Component: turbo bypass valve
- Component: turbocharger
- Component: boost pressure sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012