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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