OBD-II code · Powertrain (generic, extended)
P2CB6 Turbocharger/Supercharger Boost System Performance
The turbocharger/supercharger boost system on the B branch does not deliver the expected boost pressure. Multiple components possible.
Is it safe to drive with P2CB6?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWastegate calibration drifted
- PossibleLeak in charge air path
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–12 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbocharger B, Wastegate B, Boost Pressure Sensor B
Related codes
- P2CB3Charge Air Cooler Coolant Pump B Stuck/Stalled
- P2CB4Charge Air Cooler Coolant Pump B Supply Voltage Circuit
- P2CB5Charge Air Cooler Coolant Pump B Control Module Overtemperature
- P2CB7Turbocharger/Supercharger Boost Pressure B Not Detected – Mechanical
- P2CB8Turbocharger/Supercharger Boost Pressure B Too High – Mechanical
- P2CB9Fan 2 Underspeed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.