VOLVO
ECM-401C - Three-way catalytic converter (TWC) efficiency, bank 2. Signal too high
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
5 ModelleS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (10)
- Volvo S60 (2001–2009)2005–2006Nur Motor: B5204T5, B5244T4, B5244T5, B5254T2, B5254T4
- Volvo S80 (1999–2006)2005–2006Nur Motor: B5204T5, B5244T4, B5254T2, B6294S2, B6294T
- Volvo V70 (2000–2008)2005Nur Motor: B5204T5, B5244T4, B5244T5, B5254T2, B5254T4
- Volvo V70 (2000–2008)2006Nur Motor: B5204T5, B5244T5, B5254T2, B5254T4
- Volvo V70 XC / XC70 (2001–2007)2005Alle Motoren außer: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Nur Motor: B5244T4, B5254T2
- Volvo XC90 (2003–)2005–2006Nur Motor: B5254T2, B6294T
- Volvo XC90 (2003–)2007–2012Nur Motor: B5254T2
- Volvo XC90 (2003–)2013–2014Nur Motor: B5254T9
- Volvo XC90 (2003–)2015
Was bedeutet der Fehlercode?
The efficiency of the catalytic converter on bank 2 deviates too much, according to the engine control module. It compares the values from the rear and front oxygen sensors, and the code is set under certain driving conditions when the difference becomes too large. The cause may be misfiring, a leak, faulty fuel pressure, uneven compression or a damaged catalytic converter.
Mögliche Ursachen
- Misfiring
- Leakage in the intake system
- Leakage in the exhaust system
- Faulty fuel pressure
- Uneven compression
- Damaged catalytic converter
Was Sie tun können
- 1Look for leaks in the intake system hoses and in the exhaust system joints and gaskets
- 2Check the spark plugs for damage to the insulation, since misfiring can cause the same fault
- 3Have a workshop check fuel pressure, residual pressure and compression with diagnostic equipment
- 4Read the code and see whether it returns after a test drive
- 5If the fault remains: have a workshop try a new oxygen sensor and then a new catalytic converter
Symptome, die Sie bemerken können1
- Malfunction indicator lamp is lit
Was der Fehler beeinflussen kann1
- Rear long-term fuel trim is disabled
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.