?TANK VENTILATION DIAGNOSIS: There is software error in the diagnosis of the fuel tank ventilation valve
BMW technical service bulletin B160420 for 2020-2021 BMW X5, 2020-2021 BMW X3 and 2021 BMW X6 and others.
- Bulletin number
- B160420
- Component
- Engine and engine cooling
- Summary
- ?TANK VENTILATION DIAGNOSIS: There is software error in the diagnosis of the fuel tank ventilation valve. This error may result in the Service Engine Soon (MIL) light not being activated if a fault is found in the tank vent system after a second fault detection. This error will also disable diagnosis of the catalytic converter and oxygen sensor (if a fault is detected in the tank vent system).
Owners of these vehicles have filed 145 complaints in the engine category.
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