PowertrainP029900
CautionSeverity: Caution - get it checked when you can
Der Ladedruck des Abgasturboladers 1 weicht bei niedriger Motordrehzahl vom Sollwert ab.
Key terms: Turbocharger: an exhaust-driven fan that pushes extra air into the engine · Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Powertrain: engine, transmission and emissions
1What it means in plain English
This code is in the powertrain range that covers fuel and air metering, over-temperature, overspeed and transmission over-temperature conditions.
2Common causes
- Dirty or faulty mass air flow sensor
- Vacuum or intake air leak
- Weak fuel pump or clogged fuel filter
- Faulty fuel injector
- Faulty oxygen sensor
- Wiring or connector fault
3Can I drive?
Do not assume this code is safe to ignore: some codes in this range affect engine safety systems. Have it diagnosed; if the engine is overheating, a red warning light is on, or the engine loses power or cuts out, stop safely and get professional help.
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 5
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P029900 | Der Ladedruck des Abgasturboladers 1 weicht bei niedriger Motordrehzahl vom Sollwert ab. Brand | Powertrain |
| Hyundai | P029900 | If 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 Brand | Powertrain |
| SsangYong | P029900 | Turbocharger Underboost Condition Brand | Powertrain |
| Volvo | P029900 | If 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 Brand | Powertrain |
| Volkswagen | P029900 | Turbo/Super Charger Underboost Brand | Powertrain |
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.
5Related codes
Browse Pxxx codes or P029xx codes.