VOLVO
ECM-P040404 - Exhaust Gas Recirculation Control Circuit Range/Performance. General Failure Information. System Internal Failures
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (6)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The fault is set when the ECM finds that returning to normal operation takes too long after soot particles have been burned off. The check can only run while soot is being burned.
Possible causes
- Air leak in the intake system
- Contact resistance or oxidation in the connectors
- Sticking EGR valve
- Damaged throttle unit (intake damper)
What you can do
- 1If other fault codes are stored in the control module, troubleshoot those first, since this code can be caused by faults in other engine functions
- 2Check that the EGR valve connector is firmly seated and not oxidised
- 3Check that the EGR valve is not sticking from soot or dirt and that it moves freely
- 4Check that the intake system does not leak air
- 5Check the throttle unit connector for contact resistance and oxidation, and see that the damper moves freely
- 6If you have a diagnostic tool, read the fault status for the code after the engine has run for a while
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.