1. Connect special tool 9637.
2. Remove oxygen sensor connector 2 after TWC.
3. Connect voltmeter to pins II/8 and II/14.
4. Switch on the ignition.
Display: approx. 450 mV
If display shows > 500 mV, replace DME control module.
4 Perform adaptation.
1. Switch on the ignition.
2. Wait one minute.
Do not press the accelerator.
3. Switch off the ignition for at least 10 seconds.
4. Read out the fault memory.
02 Sensor Circuit High Voltage
P0158
02 Sensor Circuit High Voltage
Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Exhaust temperature less than 800 锟斤拷C
- Oxygen sensor heating switched on for at least 120 seconds
Possible cause of fault
- Short circuit to B+ in signal wire
- Oxygen sensor faulty
- Control module faulty
Affected pins
DME control module connector II, pin 8 and oxygen sensor jack, bank 2, pin 3
DME control module connector II, pin 14 and oxygen sensor jack, bank 2, pin 4
Diagnosis/troubleshooting
NOTE:Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (contamination of the
oxygen sensor via the reference air channel).