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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