2C77 - P0140

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