VOLVO
ECM-122D - Mass air flow (MAF) sensor. Flow too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
4 modellerC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (9)
- Volvo C30 (2007–2013)2007Kun motor: B5254T3
- Volvo C30 (2007–2013)2008–2013Kun motor: B5254T7
- Volvo C70 (2006–2013)2006–2007Kun motor: B5254T3
- Volvo C70 (2006–2013)2008–2013Kun motor: B5254T7
- Volvo S40 (2004–2013)2005–2007Kun motor: B5254T3
- Volvo S40 (2004–2013)2008Kun motor: B5254T3, B5254T7
- Volvo S40 (2004–2013)2009–2012Kun motor: B5254T7
- Volvo V50 (2004–2013)2005–2007Kun motor: B5254T3
- Volvo V50 (2004–2013)2008–2012Kun motor: B5254T7
Hva betyr feilkoden?
The mass air flow sensor is measuring less air than the engine control module has calculated, and the code is set. The cause may be a leak in the intake, poor contact in the sensor connector, a cable fault or a damaged sensor.
Mulige årsaker
- Air leakage in the intake system
- Contact resistance in the mass air flow connectors
- Signal wire short-circuited to ground
- Open circuit in the signal wire
- Open circuit in the power supply
- Damaged mass air flow sensor
Hva du kan gjøre
- 1Check the mass air flow sensor connector for contact resistance and oxidation
- 2Check the intake for leaks, since a leak makes the measured air quantity too low
- 3With your own diagnostic tool, read the air flow at idle; it varies with engine temperature and load and is normally higher when the engine is cold
- 4If the fault remains, have a workshop check the mass air flow sensor
Symptomer du kan merke2
- The malfunction indicator lamp comes on
- The engine performs worse
Hva feilen kan påvirke3
- Boost pressure is calculated instead of measured
- Rear oxygen sensor control is switched off
- Misfire detection is switched off
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.