P0139

273A - P0139

Information saved in
DME

Fault code
273A - P0139

Fault text
Bank 1 post-catalyst oxygen sensor oscillation check

Fault description


Condition for fault identification
Test condition:
* Engine speed within the limits K_LANK_OBD_S_NMin
and K_LANK_OBD_S_NMax * Engine running for at least
the time K_LANK_OBD_S_TML * In overrun fuel cutoff for
at least the time K_LANK_OBD_S_SA_T * Min.
superimposed 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
* Check to determine whether oxygen sensor voltage exceeds
K_LANK_OBD_S_SA_USF remains * Error after
K_LANK_OBD_S_CNT/K_LANK_OBD_S_AUTOM_CNT-
attempts

Action in service
1. Check exhaust system for leaks
2. If OK, replace Bank 1 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