P2414

128B01 - P2414

Information saved in
DME

Fault code
128B01 - P2414

Fault text
Oxygen sensor before catalytic converter, installation:
sensor not connected

Fault description
The diagnostic function monitors correct installation of the
oxygen sensor before the catalytic converter.

Condition for fault identification
Test condition:
The fault is recognized when the oxygen sensor on the
engine-side of the catalytic converter is not screwed firmly
into place and/or the threaded connection is not sealed.
Potential problem source(s):
- Pre-catalyst oxygen sensor not screwed in tightly or
hanging in the air
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine warmed to normal temp, above 80 °C
Time condition:
- None
Other conditions:
- Engine ON

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 2 min.

Action in service
- Determine whether the pre-catalyst oxygen sensor is
installed at the correct position
- Determine whether the pre-catalyst oxygen sensor is
screwed in tightly
- Inspect the pre-catalyst oxygen sensor for damage
- Replace pre-catalyst oxygen sensor

Fault effect and breakdown warning
Breakdown notice:
Continued driving is possible, but because the oxygen
sensor is not ready for closed-loop control, conversion of
exhaust gases in the catalytic converter will be seriously
impaired.
Possible apparent symptoms:
- MIL lamp lights up after 2nd driving cycle
- Higher exhaust emissions
- Higher fuel consumption
- Surge

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

Service instruction
None