P0158

12A801 - P0158

Information saved in
DME

Fault code
12A801 - P0158

Fault text
Oxygen sensor after catalytic converter 2, signal: short
circuit to positive

Fault description
The diagnostic function monitors the voltage of the oxygen
sensor 2 behind the catalytic converter.

Condition for fault identification
Test condition:
The fault is recognized when the voltage is greater than
1.099 V.
Potential problem source(s):
- Defect in wiring harness
- Oxygen sensor faulty
Terminal condition: none
Voltage condition:
- None
Temperature condition:
- None
Time condition:
- None
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 if
it remains present for longer than 15 sec.

Action in service
- Check wiring harness
- Replace oxygen sensor

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