2C77 - P0140

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2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction



none









2C77



2C77 - P0140







Information saved in



DME









Fault code



2C77 - P0140









Fault text



Oxygen sensor behind catalytic converter, signal









Fault description



O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)









Condition for fault identification



Test condition:





O2 sensor signal test No fault memories





Terminal condition: Terminal 15, engine on Voltage condition:





none









Condition for fault memory entry



O2 sensor voltage between 0.4 V and 0.5 V;





internal resistance in downstream oxygen sensor's circuit exceeds 60 kOhms









Action in service



Visual inspection of wiring and plugs



Measure resistance



Replace affected wire



Replace wiring harness



Replace O2 sensor







Fault effect and breakdown warning







Driver information Warning light: MIL ON

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