2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction
none
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
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