Friday, August 9, 2019

2C6E - P1131

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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