2C6E - P1131

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

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2C6E

2C6E - P1131

Information saved in

DME

Fault code

2C6E - P1131

Fault text

Oxygen sensor behind catalytic converter 2, ageing

Fault description

O2 Sensor Circuit Dynamic Test (Bank 2 Sensor 2)

Condition for fault identification

Test condition:

O2 sensor aging test

No secondary air injection, 0 < Speed < 150 km/h

Terminal condition: Terminal 15, engine on Voltage condition:

none

Condition for fault memory entry

Switching time counter > 1.5 (sensor transition from rich to lean too slow)

Action in service

Was the temperature drop caused by external factors (driving into snow pile, ice on O2 sensor?) Thaw sensor, clear all fault memory, continue driving!

Check O2 sensor heater: Contact resistance on plugs and in wiring is excessive (DME - wiring harness - sensor)

Check wiring

Check O2 sensor plug (water or corrosion in the plug? Repeatedly disconnect the plug and then re-insert it FIRMLY)

Replace plug and/or wire as indicated

Replace the affected downstream (post-cat) O2 sensor

Fault effect and breakdown warning

Driver information Warning light: MIL ON