02 Sensor Circuit
P015002 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).
