P0140

27C8 - P0140

Information saved in
DME

Fault code
27C8 - P0140

Fault text
Oxygen sensor behind catalytic converter, bank 1, signal

Fault description
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

Condition for fault identification
Test condition:
Oxygen sensor voltage
lank_us_b1 > 400 mV (K_LANK_USM) and
lank_us_b1 < 508 mV (K_LANK_USF)
for min. 10 sec. (K_LANK_DIAG_OL_T)
Terminal condition: Engine running
Voltage condition:
Battery voltage > 9V (k_ed_ubmin)

Condition for fault memory entry
16 sec.

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