VOLVO
ECM-0420 - Three-way catalytic converter (TWC) efficiency, bank 1.Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.
Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (14)
- Volvo C30 (2007–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo C30 (2007–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo C30 (2007–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
- Volvo C30 (2007–2013)2013Kun motor: B4204S3, B4204S4
- Volvo S40 (2004–2013)2005Kun motor: B4164S3, B4184S11
- Volvo S40 (2004–2013)2006Kun motor: B4164S3, B4184S11, B4184S8
- Volvo S40 (2004–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo S40 (2004–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo S40 (2004–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
- Volvo V50 (2004–2013)2005Kun motor: B4164S3, B4184S11
- Volvo V50 (2004–2013)2006Kun motor: B4164S3, B4184S11, B4184S8
- Volvo V50 (2004–2013)2007–2009Kun motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo V50 (2004–2013)2010Kun motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo V50 (2004–2013)2011–2012Kun motor: B4164S3, B4204S3, B4204S4
Hva betyr feilkoden?
The control module checks the efficiency of the catalytic converter on bank 1 by comparing the signal from the rear oxygen sensor with the front one. If the converter performs below a set level, the fault is recorded. The causes may be misfires, leaks in the intake or exhaust system, faulty fuel pressure or uneven compression, but also an aged or damaged converter.
Mulige årsaker
- Misfiring
- Air leakage in the intake system
- Leakage in the exhaust system
- Faulty fuel pressure
- Uneven compression
- Aged or damaged catalytic converter
Hva du kan gjøre
- 1Read out the fault code, erase it and road-test to see whether it returns
- 2Look for air leaks in the intake system, such as cracks in hoses and at connections
- 3Look for leaks in the exhaust system, such as soot around joints and clamps
- 4If you have a diagnostic tool, read the misfire counters in live data, since misfires can damage the catalytic converter
- 5If the intake and exhaust systems are sealed, have a workshop check the fuel pressure and compression, and replace the converter if the fault remains
Symptomer du kan merke1
- The malfunction indicator lamp (MIL) is lit
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