272A - P0137 (DME)

272A - P0137

Information 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