OBD-II code · Powertrain (generic, extended)
P226B Turbocharger/Supercharger A Boost Pressure Too High - Mechanical
Boost pressure on turbo A exceeds the upper threshold and the cause is mechanical (wastegate stuck closed, VGT vanes stuck closed) rather than electrical drive fault.
Is it safe to drive with P226B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWastegate or VGT stuck closed
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
- 1.5–8 h
- Emissions test
- Likely to fail
- Parts involved
- Turbocharger, Wastegate
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.