p0299
Moderate
Fiat · Cars
Turbocharger Underboost Condition
Quick Answer
Error code P0299 on your Fiat Cars means: Turbocharger Underboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check actual boost pressure with gauge
2
Test turbo boost pressure sensor signal
3
Inspect all boost piping for leaks
4
Check wastegate actuator operation
5
Inspect turbocharger for internal damage
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
Boost hoses
Turbo pressure sensor
Wastegate valve
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