2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 147
2C7E – P114B
Information saved in
DME
Fault code
2C7E – P114B
Fault text
Oxygen sensor behind catalytic converter, trim control
Fault description
Post Catalyst Fuel Trim Via Oxygen Sensor System Too
Lean (Bank 1)
Condition for fault identification
Test condition:
none
Terminal condition: none
Voltage condition:
none
Condition for fault memory entry
none
Action in service
none
Fault effect and breakdown warning
Driver information
Warning light:
none
Service instruction
none
2C7F – P114C (DME)
2C7F – P114C
Information saved in
DME
Fault code
2C7F – P114C
Fault text
Oxygen sensor behind catalytic converter 2, trim control
Fault description
Post Catalyst Fuel Trim Via Oxygen Sensor System Too
Rich (Bank 2)
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
(approximately 0.9 V)
