VOLVO
ECM-21FB - Long-term fuel trim, bank 2. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS80 (1999–2006), XC90 (2003–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The fault concerns fuel adaptation on bank 2, even though the code is named signal missing. It is only set once an underlying adaptation code has been stored in two consecutive driving cycles, and it is always present together with one of them.
Mulige årsaker
- Consequential fault from an underlying fault code for adaptive lambda regulation on bank 2
Hva du kan gjøre
- 1Start by fixing the root fault among the bank 2 adaptation codes, since this code has no fault-tracing of its own
- 2Have a diagnostic tool? Read the codes and see which bank 2 adaptation codes are stored next to this one
- 3Clear the code only after the underlying faults are fixed, and road test to check that it does not return
Symptomer du kan merke1
- The engine warning lamp comes on or behaves abnormally
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