Manufacturer Code Charts: 2751

2751 - P112D

Information saved in
DME

Fault code
2751 - P112D

Fault text
Bank 2 pre-catalyst oxygen sensor pumping current wire
fault

Fault description


Condition for fault identification
Test condition:
Condition analog to oxygen sensor plausibility diagnosis /
SA diagnosis
Terminal condition: Engine running -
idle or partial load
Voltage condition:
none

Condition for fault memory entry
Lambda AF ratio lies within this range
K_LAVK_OBD_PLAU_LAM_Min and
K_LAVK_OBD_PLAU_LAM_Max however the post-cat
lambda is outside the range
K_LAVK_OBD_PLAU_LANK_Max and
K_LAVK_OBD_PLAU_LANK_Min OR oxygen sensor
voltage is less than K_LAVK_OBD_SA_SC

Action in service
1. Check plug and wiring harness at Bank 2 pre-catalyst
oxygen sensor (especially IP pumping current)
2. If OK, replace sensor

Fault effect and breakdown warning
MIL lamp on after engine runs 2x / Small influence on
drivability

Driver information
Warning light:
No

Service instruction
none