27CD

27CD - P0161

Information saved in
DME

Fault code
27CD - P0161

Fault text
Oxygen sensor behind cat., bank 2, heat output

Fault description
O2 Sensor Heater Circuit (Bank 2 Sensor 2)

Condition for fault identification
Test condition:
Resistance < 17 ohms (K_LSHNK_DIAG_RU) or resistance
> 36 ohms (K_LSHNK_DIAG_RO)
Terminal condition: Engine running
Voltage condition:
Battery voltage > 9V (k_ed_ubmin)

Condition for fault memory entry
Oxygen sensor dew point must be exceeded longer than
K_LSHNK_DIAG_TAUP_T (60 sec.)

Action in service
1.) Check plug and wiring harness at the oxygen sensor
2.) Replace the oxygen sensor

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

Driver information
Warning light:
MIL

Service instruction
none