Boost leak (intercooler hose, pipe clamp). Sticking turbo wastegate. Faulty boost pressure sensor. Worn turbocharger. Blocked or damaged intercooler.

Which cars are affected by P0299?

P0299 is most commonly reported on Volkswagen, Audi, Ford, Vauxhall, BMW vehicles, but can appear on any make.

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P0299

Medium severity

Turbocharger/Supercharger Underboost

The turbocharger or supercharger is not producing the expected amount of boost pressure. This results in noticeable power loss, especially under acceleration.

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Common causes of P0299

1Boost leak (intercooler hose, pipe clamp)

2Sticking turbo wastegate

3Faulty boost pressure sensor

+2 more causes

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Commonly affected vehicles

VolkswagenAudiFordVauxhallBMW

P0299 can appear on any vehicle — these are the makes where it is most frequently reported.

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Recalls & technical bulletins

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Related fault codes

P0171Medium

System Too Lean (Bank 1)

P0300High

Random/Multiple Cylinder Misfire Detected

P0420Medium

Catalyst System Efficiency Below Threshold (Bank 1)

P0172Medium

System Too Rich (Bank 1)