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P0299: Turbocharger/Supercharger Underboost
Severity: Medium Drive gently and get it diagnosed soon.
What does P0299 mean?
The turbo or supercharger is producing less boost than expected.
Generic OBD-II definition: Turbocharger/Supercharger Underboost. Confirm applicability in your vehicle service information.
Common causes
- Boost leak (cracked intercooler pipe or loose clamp)
- Wastegate stuck open
- Failing turbocharger
- Faulty boost sensor
Symptoms
- Noticeable loss of power
- Whistling or hissing under acceleration
Can I keep driving with P0299?
Severity: Medium Drive gently and get it diagnosed soon.
If the check engine light is flashing or the car runs badly, stop driving and have it checked.
Typical fixes
- Pressure-test the intake/intercooler system
- Inspect wastegate
- Check turbo for shaft play