P0140

Tests 1 - 2:

Tests 3 - 7:

SYMPTOM
P0140 - 1/2 O2 SENSOR STAYS AT CENTER

WHEN MONITORED
With the engine running for more than 2 minutes and engine temperature greater than 76 °C (170 °F).

SET CONDITION
The Upstream Oxygen Sensor Signal voltage is between 0.35 volt and 0.55 volt for 1.5 minutes.

POSSIBLE CAUSE
- O2 sensor 1/2 ground circuit open
- O2 sensor 1/2 signal circuit open
- 1/2 O2 sensor wiring harness intermittent defect
- 1/2 O2 sensor wiring harness observable defect
- 02 sensor 1/2 defective
- PCM defective