P0156

273B - P0156

Information saved in
DME

Fault code
273B - P0156

Fault text
Bank 2 post-catalyst oxygen sensor oscillation check

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 * Full-load condition for the
minimum time K_LANK_OBD_S_Volllast_T
Terminal condition: Engine running
Voltage condition:
none

Condition for fault memory entry
Oxygen sensor signal too low (low threshold
K_LANK_OBD_S_Volllast_US) for
K_LANK_OBD_S_CNT/K_LANK_OBD_S_AUTOM_CNT
requests

Action in service
1. Check exhaust system for leaks
2. If OK, replace Bank 2 post-catalyst oxygen sensor

Fault effect and breakdown warning
MIL lamp lights up after engine runs 2X

Driver information
Warning light:
No

Service instruction
none