P0150
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°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).
Diagnosis/troubleshooting - all naturally-aspirated models
NOTE: The DTC relates only to implausible signals here.
Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Oxygen sensor heating switched on for at least 60 seconds
- Exhaust temperature less than 800°C
Possible cause of fault
- High-resistance short circuit to B+ in signal wire
- Heater coupling
- Oxygen sensor faulty
- Control module faulty
Affected pins
DME control module connector II, pin 10 and oxygen sensor jack, bank 2, pin 3.
DME control module connector II, pin 16 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).
Part 1:
Part 2:
