VOLVO
ECM-4477 - Exhaust gas recirculation (EGR) control. Flow too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The engine control module (ECM) monitors EGR control and finds a fault that causes too little exhaust gas to be routed back compared with what is needed. The code is set when EGR control is incorrect, and the cause may be the valve, its wiring or an air leak in the intake.
Mulige årsaker
- Poor contact, contact resistance or oxidation at the EGR valve connections
- Dirt or soot makes the EGR valve stick
- Break in the wiring to the EGR valve
- Air leak in the intake system
- Damaged EGR valve
Hva du kan gjøre
- 1Note the fault code, erase it and test-drive to see whether it returns
- 2Check that the EGR valve connector is firmly seated and free from oxidation
- 3Look at the valve for soot and dirt that may restrict the flow
- 4Look for cracks, loose hoses and other leaks in the intake air, since a leak affects EGR flow
- 5With a multimeter you can check that the wiring to the EGR valve has no break
Symptomer du kan merke2
- Emissions warning lamp is on
- Message shown in the text display
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