Thursday, July 25, 2019

2C6C - P2272

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



none









2C6C - P2272 (DME)



2C6C - P2272







Information saved in



DME









Fault code



2C6C - P2272









Fault text



Oxygen sensor behind catalytic converter 2, system check









Fault description



O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 2)









Condition for fault identification



Test condition:





O2 sensor system check





O2 sensor voltage too high = Signal sticks at rich





Trim controller diagnosis must have been executed, see Trim controller diagnosis. Detection of malfunctions during the trim control diagnosis triggers the active test. Engine running at idle is adequate for the active test;





Terminal condition: Terminal 15, engine on Voltage condition:





none









Condition for fault memory entry



O2 sensor behind catalytic converter voltage > 0.7 V with lean O2 data specification in active test









Action in service



This malfunction is detected during the active test. The active test is triggered by the trim control diagnosis function (trim controller fault code stored in the control module's fault memory!)





Initiate system test for reversed O2 sensors. Follow instructions for system test.



If the system test fails to produce a result then



Visual inspection of wiring and plugs



Electrical check of wiring



Replace wires or plugs as indicated



Check exhaust system upstream from downstream (post- cat) O2 sensor for leaks



Replace downstream (post-cat) O2 sensor



Replace upstream (pre-cat) O2 sensor



Replace control module







Fault effect and breakdown warning







Driver information Warning light: none

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