2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 143
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Condition for fault memory entry
O2 sensor behind catalytic converter voltage < 0.2 V with
rich data specification for 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!)
1. Initiate system test for reversed O2 sensors. Follow
instructions for system test.
2. If the system test fails to produce a result then
3. Visual inspection of wiring and plugs
4. Electrical check of wiring
5. Replace wires or plugs as indicated
6. Check exhaust system upstream from downstream (postcat)
O2 sensor for leaks
7. Replace downstream (post-cat) O2 sensor
8. Replace upstream (pre-cat) O2 sensor
9. Replace control module
Fault effect and breakdown warning
Driver information
Warning light:
MIL ON
Service instruction
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2C6D
2C6D – P1130
Information saved in
DME
Fault code
2C6D – P1130
Fault text
Oxygen sensor behind catalytic converter, ageing
Fault description
O2 Sensor Circuit Dynamic Test (Bank 1 Sensor 2)
Condition for fault identification
Test condition:
O2 sensor aging test
No secondary air injection,
0 < Speed 1.5 (sensor transition from rich to
lean too slow)
Action in service
0. Was the temperature drop caused by external factors
(driving into snow pile, ice on O2 sensor?) Thaw sensor,
clear all fault memory, continue driving!
1. Check O2 sensor heater: Contact resistance on plugs and
in wiring is excessive (DME – wiring harness – sensor)
2. Check wiring
3. Check O2 sensor plug (water or corrosion in the plug?
Repeatedly disconnect the plug and then re-insert it
