P0138

272A - P0138

Information saved in
DME

Fault code
272A - P0138

Fault text
Oxygen sensor, signal behind cat., bank 1

Fault description
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

Condition for fault identification
Test condition:
Oxygen sensor voltage lank_us_b1 > 1099 mV
(K_LANK_DIAG_UMAX)
for at least 10 sec. (K_LANK_DIAG_MAX_T)
Terminal condition: Engine running
Voltage condition:
Battery voltage > 9V (k_ed_ubmin)

Condition for fault memory entry
Depends on processing load

Action in service
1. Check plug and wiring harness on post-cat oxygen sensor
LSNK B1,
2. If OK replace sensor

Fault effect and breakdown warning
MIL on after engine runs 2x

Driver information
Warning light:
MIL

Service instruction
none