DME 7.8

P0140

02 Sensor Circuit No Activity Detected

Diagnostic conditions
- Exhaust temperature between 250°C and 750°C
- Battery positive voltage between 10 V and 16 V
- Time elapsed after engine start-up greater than 200 seconds
- Oxygen sensor heating switched on for at least 120 seconds

Possible cause of fault
- Loose contact or corrosion in connector
- Open circuit in the oxygen sensor signal wire
- Open circuit in the oxygen sensor ground wire
- Oxygen sensor faulty
- DME control module faulty

Affected terminals
DME control module connector II, pin 11 and oxygen sensor jack, bank 1, pin 3

DME control module connector II, pin 17 and oxygen sensor jack, bank 1, 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: