VOLVO
ECM-121B - Mass air flow (MAF) sensor. Flow too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Vis modeller per årsmodell og motor (14)
- Volvo S60 (2001–2009)2005–2006Kun motor: B5204T5, B5244T4, B5244T5, B5254T2, B5254T4
- Volvo S60 (2001–2009)2007Kun motor: B5204T5, B5244T5, B5254T2, B5254T4
- Volvo S60 (2001–2009)2008–2009Kun motor: B5204T5, B5244T5, B5254T2
- Volvo S80 (1999–2006)2005–2006Kun motor: B5204T5, B5244T4, B5254T2, B6294S2, B6294T
- Volvo V70 (2000–2008)2005Kun motor: B5204T5, B5244T4, B5244T5, B5254T2, B5254T4
- Volvo V70 (2000–2008)2006–2007Kun motor: B5204T5, B5244T5, B5254T2, B5254T4
- Volvo V70 (2000–2008)2008Kun motor: B5254T2
- Volvo V70 XC / XC70 (2001–2007)2005Alle motorer unntatt: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Kun motor: B5244T4, B5254T2
- Volvo V70 XC / XC70 (2001–2007)2007Kun motor: B5254T2
- Volvo XC90 (2003–)2005–2006Kun motor: B5254T2, B6294T
- Volvo XC90 (2003–)2007–2012Kun motor: B5254T2
- Volvo XC90 (2003–)2013–2014Kun motor: B5254T9
- Volvo XC90 (2003–)2015
Hva betyr feilkoden?
The air mass correction value has become too low, while the long-term fuel adjustment lies outside its normal range. The measured air quantity is therefore lower than the calculated one, and the engine may run poorly.
Mulige årsaker
- Oxidation or contact resistance in the mass air flow connectors
- Air leakage in the intake system
- Blocked intake system
- Damaged mass air flow sensor
Hva du kan gjøre
- 1Check the mass air flow sensor connector for contact resistance and oxidation
- 2Check that the hoses between the mass air flow sensor and the throttle unit are secure and sealed
- 3Look inside the throttle housing for dirt and clean it if needed
- 4Clear the code and road test
- 5If the fault remains after these checks, have a workshop check or replace the mass air flow sensor
Symptomer du kan merke2
- Malfunction indicator lamp on
- The engine runs worse than normal
Hva feilen kan påvirke3
- Boost pressure and air mass are 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.