p0299
Moderate
Alfa Romeo · Sedans & Sports Cars
Turbo/Supercharger Underboost Condition
Quick Answer
Error code P0299 on your Alfa Romeo Sedans & Sports Cars means: Turbo/Supercharger Underboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect boost hose connections
2
Check for boost leaks with pressure test
3
Verify wastegate valve operation
4
Inspect turbo for wear
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Turbo boost hose
Wastegate valve
Air filter
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