VOLVO
ECM-122D - Mass air flow (MAF) sensor. Flow too low
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
4 ModelleC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (9)
- Volvo C30 (2007–2013)2007Nur Motor: B5254T3
- Volvo C30 (2007–2013)2008–2013Nur Motor: B5254T7
- Volvo C70 (2006–2013)2006–2007Nur Motor: B5254T3
- Volvo C70 (2006–2013)2008–2013Nur Motor: B5254T7
- Volvo S40 (2004–2013)2005–2007Nur Motor: B5254T3
- Volvo S40 (2004–2013)2008Nur Motor: B5254T3, B5254T7
- Volvo S40 (2004–2013)2009–2012Nur Motor: B5254T7
- Volvo V50 (2004–2013)2005–2007Nur Motor: B5254T3
- Volvo V50 (2004–2013)2008–2012Nur Motor: B5254T7
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- 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
Was Sie tun können
- 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
Symptome, die Sie bemerken können2
- The malfunction indicator lamp comes on
- The engine performs worse
Was der Fehler beeinflussen kann3
- Boost pressure is calculated instead of measured
- Rear oxygen sensor control is switched off
- Misfire detection is switched off
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.