VOLVO
ECM-0420 - Three-way catalytic converter (TWC) efficiency, bank 1.Signal too low
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
3 ModelleC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (14)
- Volvo C30 (2007–2013)2007–2009Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo C30 (2007–2013)2010Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo C30 (2007–2013)2011–2012Nur Motor: B4164S3, B4204S3, B4204S4
- Volvo C30 (2007–2013)2013Nur Motor: B4204S3, B4204S4
- Volvo S40 (2004–2013)2005Nur Motor: B4164S3, B4184S11
- Volvo S40 (2004–2013)2006Nur Motor: B4164S3, B4184S11, B4184S8
- Volvo S40 (2004–2013)2007–2009Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo S40 (2004–2013)2010Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo S40 (2004–2013)2011–2012Nur Motor: B4164S3, B4204S3, B4204S4
- Volvo V50 (2004–2013)2005Nur Motor: B4164S3, B4184S11
- Volvo V50 (2004–2013)2006Nur Motor: B4164S3, B4184S11, B4184S8
- Volvo V50 (2004–2013)2007–2009Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3
- Volvo V50 (2004–2013)2010Nur Motor: B4164S3, B4184S11, B4184S8, B4204S3, B4204S4
- Volvo V50 (2004–2013)2011–2012Nur Motor: B4164S3, B4204S3, B4204S4
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- Misfiring
- Air leakage in the intake system
- Leakage in the exhaust system
- Faulty fuel pressure
- Uneven compression
- Aged or damaged catalytic converter
Was Sie tun können
- 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
Symptome, die Sie bemerken können1
- The malfunction indicator lamp (MIL) is lit
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.