P114B

118802 - P114B

Information saved in
DME

Fault code
118802 - P114B

Fault text
Oxygen sensor after catalytic converter, fine mixture
control: exhaust gas after catalytic converter too lean

Fault description
The diagnostic function monitors the lambda closed-loop
mixture control.

Condition for fault identification
Test condition:
The fault is recognized when the mixture for Bank 1 is too
lean and the adaptation limit of 32 % is exceeded for 50 sec.
Potential problem source(s):
- Wiring harness for pressure sensors on intake and engine
sides of throttle valve defective
- Pressure sensor on intake and engine sides of throttle valve
defective
- Leak in exhaust system
- Catalytic converter clogged
- Fuel injector defective
Terminal condition: none
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- Ambient temperature > -10 °C
Time condition:
- None
Other conditions:
- Engine on
- Adaptation active

Condition for fault memory entry
The diagnostic fault code is logged when specified
conditions are satisfied, but a reaction period cannot be
provided.

Action in service
- Check wiring harness for pressure sensors on intake and
engine sides of throttle valve
- Repair pressure sensors on intake and engine sides of
throttle valve
- Check exhaust system for leaks
- Replace fuel injector

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- Misfiring

Driver information
Warning light:
- ECE emissions warning lamp: on
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- none