P0137
272A - P0137Information saved in
DME
Fault code
272A - P0137
Fault text
Oxygen sensor, electrical diagnosis, behind cat., Bank 1
Fault description
Condition for fault identification
Test condition:
* Sensor heater must be active for at least
K_LSHNK_AKTIV_Taktiv *exhaust-gas temperature >
K_LANK_DIAG_TKat *LA controller is active for
K_LANK_DIAG_VK_REG_T
* Sensor temperature > K_LANK_DIAG_SONDTEMP
*catalyst temperature > K_LANK_TKat_SCHW
Terminal condition: Engine running
Voltage condition:
ub > K_ED_PlusMin
Condition for fault memory entry
Oxygen sensor voltage
lank_us_b1 < K_LANK_DIAG_UMin
for min. K_LANK_DIAG_GND_T
Action in service
1. Check plug and wiring harness to post-catalyst oxygen
sensor behind Bank 1 catalyst
2. If OK, replace oxygen sensor
Fault effect and breakdown warning
MIL lamp lights up after engine runs 2X
Driver information
Warning light:
No
Service instruction
none