VOLVO
ECM-440A - Long-term fuel trim. Upper limit
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.
Gjelder følgende modeller:
3 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The engine control module receives information from the oxygen sensor that the mixture shifts around λ=1 during closed-loop control. If the sensor sticks at the upper limit, meaning a rich mixture, for longer than permitted, the fault code is set and gas power is disabled.
Mulige årsaker
- Incorrect gas pressure or damaged pressure regulator
- Fault in the wiring harness
- Damaged fuel shut-off valve or stepper motor
- Clogged or damaged fuel distributor
- Damaged mass air flow sensor
Hva du kan gjøre
- 1Have a workshop measure the gas pressure, since incorrect pressure can give a rich mixture
- 2Look for a damaged wiring harness or loose connectors in the gas system wiring
- 3Have a workshop check the fuel distributor, the stepper motor and the fuel shut-off valve if the fault remains
- 4Have a workshop check the mass air flow sensor and replace it if it is damaged
- 5Clear the fault code after the repair and test drive the car on gas
Symptomer du kan merke2
- The engine will not operate on gas
- Switch to gas power is not possible
Hva feilen kan påvirke1
- Gas power is disabled
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.