4. With an ohmmeter, measure resistance between special tool 9637, pin II/10, and oxygen sensor connector, pin 3.
Display: 0 - 5 ohms
3 Check output stage of DME control module.
1. Connect special tool 9637.
2. Remove oxygen sensor connector 2 ahead of TWC.
3. Connect voltmeter to pins II/10 and II/16.
4. Switch on the ignition.
Display: approx. 450 mV
If display shows less then 400 mV or greater then 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
P0150
02 Sensor Circuit
NOTE: The diagnosis for this fault is different for models with turbo engines and models with naturally-aspirated engines.
Diagnosis/troubleshooting - all turbo models
NOTE: The DTC (diagnostic trouble code) covers all electrical faults here.
Diagnostic conditions
- Engine temperature greater than 60 锟斤拷C
- 3 minutes idle speed, then 30 seconds increased idle speed
Possible cause of fault
- Short circuit to B+
- Short circuit to ground
- Open circuit
- Oxygen sensor faulty
- Control module faulty
Affected pins
DME control module connector II, pin 10 and oxygen sensor jack, bank 2, pin 5
DME control module connector II, pin 16 and oxygen sensor jack, bank 2, pin 1
DME control module connector II, pin 6 and pin 24
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).