OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2261?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyStuck bypass valve
- PossibleLeak in vacuum/pressure actuator
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbo Bypass Valve, Turbocharger, Boost Pressure Sensor
Related codes
- P225ENOx Sensor Performance - Signal Biased/Stuck High (Bank 1 Sensor 2)
- P225FNOx Sensor Performance - Signal Biased/Stuck Low (Bank 1 Sensor 2)
- P2260Secondary Air Injection System Control B Circuit High
- P2262Turbo Boost Pressure Not Detected - Mechanical
- P2263Turbo/Super Charger Boost System Performance
- P2264Water in Fuel Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.