Fault code lookup

PowertrainP0299

Caution

Severity: Caution - get it checked when you can

Turbocharger/Supercharger Underboost

38 brands affected · Generic SAE J2012 description.

Key terms: Turbocharger: an exhaust-driven fan that pushes extra air into the engine · Supercharger: an engine-driven fan that pushes extra air into the engine · Boost pressure: extra air pressure made by a turbo or supercharger · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The turbocharger or supercharger is making less boost than the engine computer expects. The car feels low on power.

2Common causes

  1. Leaking or split boost/intake hose
  2. Faulty boost control valve (wastegate or diverter)
  3. Faulty boost pressure sensor
  4. Turbocharger wear or damage
  5. Sticking variable-vane mechanism

3Can I drive?

Caution · drive with care

Usually safe to drive gently. Power will be reduced. Avoid hard acceleration and have it checked soon.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 38

BrandCodeDescriptionSystem
Ashok Leyland CVP0299Data Record BrandPowertrain
BAIC MotorP0299Underboost BrandPowertrain
BYDP0299Turbocharger/Supercharger Underboost BrandPowertrain
CheryP0299Permanent Governor Deviation In PCR BrandPowertrain
ChryslerP0299Turbocharger/Supercharger Underboost SAEPowertrain
DaewooP0299Boost Pressure Low Pressure BrandPowertrain
DaihatsuP0299VN turbo closed side abnormal BrandPowertrain
DFFSP0299Turbocharger low pressure BrandPowertrain
DFFXP0299Turbocharger low pressure BrandPowertrain
DFXKP0299Turbo boost insufficient BrandPowertrain
EOBDP0299Turbolader/kompressor 'A' for lavt ladetryk BrandPowertrain
FordP0299This service function should be run after the cause and rectification of of the following DTC has been carried out BrandPowertrain
GeelyP0299Turbo Boost Insufficient BrandPowertrain
GMP0299Turbocharger engine underboost BrandPowertrain
Great WallP0299Turbocharger/Supercharger Underboost BrandPowertrain
HafeiP0299Turbocharger/Supercharger Underboost BrandPowertrain
HoldenP0299Engine Underboost BrandPowertrain
HondaP0299Turbocharger/Supercharger Underboost SAEPowertrain
HyundaiP0299Turbocharger/Supercharger Underboost SAEPowertrain
IsuzuP0299Turbocharger/Supercharger Underboost SAEPowertrain
Land RoverP0299Turbocharger/Supercharger Underboost SAEPowertrain
MahindraP0299Turbocharger/Supercharger Underboost SAEPowertrain
MaseratiP0299Turbocharger underboost BrandPowertrain
MazdaP0299Turbocharger/Supercharger Underboost SAEPowertrain
MitsubishiP0299Turbocharger underboost BrandPowertrain
OpelP0299Turbocharger engine underboost BrandPowertrain
PeroduaP0299VN turbo closed side abnormal BrandPowertrain
PeugeotP0299Turbocharger/Supercharger Underboost SAEPowertrain
PorscheP0299Turbocharger/Supercharger Underboost SAEPowertrain
ProtonP0299Turbocharger underboost BrandPowertrain
SaabP0299Turbocharger Engine Underboost BrandPowertrain
MG (SAIC)P0299Turbocharger Underboost BrandPowertrain
SubaruP0299Turbocharger/Supercharger Underboost SAEPowertrain
SuzukiP0299Turbocharger / Supercharger 'A' Underboost Condition BrandPowertrain
SWM MotorP0299Turbo is not supercharged enough BrandPowertrain
TataP0299Boost Control Error BrandPowertrain
ToyotaP0299Booster boost pressure insufficient BrandPowertrain
VolkswagenP0299Boost pressure regulation: control range not reached BrandPowertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 9

These 7-character codes are manufacturer-specific variants of P0299 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP029900Der Ladedruck des Abgasturboladers 1 weicht bei niedriger Motordrehzahl vom Sollwert ab. BrandPowertrain
HyundaiP029900If boost pressure sensor output value is lower than target value for more than 6 sec. under engine speed over 1500 RPM and amount of fuel injection 20mg/hub condition ECM sets DTC. This fault might be caused by air leakage on intake system BrandPowertrain
SsangYongP029900Turbocharger Underboost Condition BrandPowertrain
VolvoP029900If the diagnostic trouble code (DTC) is generated together with ECM- there is leakage from th hose or connection between the turbo unit and the throttle module BrandPowertrain
VolkswagenP029900Turbo/Super Charger Underboost BrandPowertrain
Mercedes-BenzP029909The boost pressure of turbocharger 1 is too low. There is a component fault. BrandPowertrain
SprinterP029909No description available Powertrain
Mercedes-BenzP029922No description available Powertrain
SprinterP029922No description available Powertrain

6Related codes

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