Monday, July 13, 2020

2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts

2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts

none

P2270

2C6B – P2270

Information saved in

DME

Fault code

2C6B – P2270

Fault text

Oxygen sensor behind catalytic converter, system check

Fault description

O2 Sensor Signal Biased/Stuck Lean (Bank 1 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

273

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