P1131

27CB - P1131

Information saved in
DME

Fault code
27CB - P1131

Fault text
Bank 2 post-catalyst oxygen sensor restart diagnosis

Fault description


Condition for fault identification
Test condition:
* Engine speed within the boundaries
K_LANK_OBD_S_NMin and K_LANK_OBD_S_NMax *
Engine running since at least the time
K_LANK_OBD_S_TML
* in overrun fuel cutoff for at least K_LANK_OBD_S_SA_T
* min. integrated air mass in overrun fuel cutoff
K_LANK_OBD_S_SA_ML_SUM => defined overrun cutoff
Terminal condition: Engine running
Voltage condition:
none

Condition for fault memory entry
* Determine whether sensor voltage of less than
K_LANK_OBD_S_USF remains within the time
K_LANK_OBD_S_WE_T * if yes, then enrichen by
KF_LANK_OBD_S_LAM_SOLeerlauf for the period
K_LANK_OBD_S_WE_LAM_T * Error after
K_LANK_OBD_S_CNT/K_LANK_OBD_S_AUTOM_CNT
attempts

Action in service
1.) Check plug and wiring harness at the oxygen sensor
2.) Replace the oxygen sensor

Fault effect and breakdown warning
MIL lamp lights up after two driving cycles

Driver information
Warning light:
No

Service instruction
none