VOLVO
ECM-4438 - Exhaust gas recirculation (EGR) control. Jammed
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
3 ModelleC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (3)
Was bedeutet der Fehlercode?
The engine control module (ECM) monitors EGR control. When the valve jams, for example from soot or dirt, and does not follow the control signals, the code is set. The fault can also come from the wiring or connectors to the valve.
Mögliche Ursachen
- Loose connections, contact resistance or oxidation at the EGR valve terminals
- EGR valve jams, for example from dirt or soot
- Break in the wiring to the EGR valve
- Wiring to the EGR valve shorted to ground or supply voltage
- Damaged EGR valve
Was Sie tun können
- 1Read off and note the fault code, erase it and test-drive the engine to see whether it returns
- 2Look at the EGR valve connector to see whether it is loose or oxidised
- 3Check mechanically whether the valve is clogged with soot and sticking
- 4With a multimeter you can check for a break and for contact with ground in the wiring to the EGR valve
- 5If the fault remains, have a workshop with diagnostic equipment check the valve and its wiring
Symptome, die Sie bemerken können2
- Message shown in the text display
- Check engine light lit
Was der Fehler beeinflussen kann2
- EGR control is disconnected
- Engine output is limited
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.