P0160

12AC04 - P0160

Information saved in
DME

Fault code
12AC04 - P0160

Fault text
Oxygen sensor after catalytic converter 2, signal: open
circuit

Fault description
The diagnostic function monitors the lower and upper
voltage limits of the signals from the post-catalyst oxygen
sensor 2 and the upper limit of the internal resistance.

Condition for fault identification
Test condition:
The fault is recognized when the oxygen sensor voltage is
less than 0.498 V and greater than 0.352 V and the
resistance is greater than 65534 ohms.
Potential problem source(s):
- Defect in wiring harness to oxygen sensor 2 behind
catalytic converter
- Oxygen sensor 2 behind catalytic converter defective
Terminal condition: none
Voltage condition:
- None
Temperature condition:
- Engine temperature > 85 °C
Time condition:
- 120 sec.
Other conditions:
- Engine on
- No additional diagnostic fault codes logged

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check wiring harness to oxygen sensor 2 behind catalytic
converter
- Replace post-catalyst oxygen sensor 2

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- none

Driver information
Warning light:
- ECE emissions warning lamp: on
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- none