Thursday, July 23, 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

P114A

2C7E – P114A

Information saved in

DME

Fault code

2C7E – P114A

Fault text

Oxygen sensor behind catalytic converter, trim control

Fault description

Post Catalyst Fuel Trim Via Oxygen Sensor System Too

Rich (Bank 1)

Condition for fault identification

Test condition:

O2 sensor trim control

No fault memories

Drive at 50 – 80 km/h and at moderate engine speed.

Terminal condition: Terminal 15, engine on

Voltage condition:

none

Condition for fault memory entry

Excessive trim controller deviation; behind catalytic

converter sensor voltage outside range around trim

controller specification point with trim controller active

63

(approximately 0.9 V)

Action in service

This fault automatically triggers an active test (secondary

fault stored in the control module’s fault memory!).

1. Read out results of active test (are other fault codes still

stored in the fault memory)? => Then continue at this point!)

2. Initiate system test for reversed O2 sensors. Follow

instructions for system test.

3. If the system test fails to produce a result then

4. Visual inspection of wiring and plugs

5. Electrical check of wiring

6. Replace wiring or plugs as indicated

7. Check exhaust system forward of downstream (post-cat)

O2 sensor for leaks

8. Replace downstream (post-cat) O2 sensor

9. Replace upstream (pre-cat) O2 sensor

10. Replace control module

Fault effect and breakdown warning