P0137

Tests 1 - 4:

Tests 5 - 7:

SYMPTOM
P0137-1/2 O2 SENSOR SHORTED TO GROUND

TEST NOTE
This symptom is diagnosed using the test P0131-1/1 O2 SENSOR SHORTED TO GROUND.

WHEN MONITORED
At a cold start, engine coolant below 36 °C (98 °F), ambient/battery sensor reading within 6.6 °C (20 °F), and engine coolant temperature above 71 °C (160 °F) on the previous key OFF.

SET CONDITION
The oxygen sensor signal voltage is below 0.059 volts for 3 seconds after starting engine.

POSSIBLE CAUSES
- Intermittent condition
- O2 sensor operation
- O2 sensor signal circuit shorted to ground
- O2 sensor signal circuit shorted to sensor ground circuit
- O2 sensor signal shorted to heater ground circuit
- PCM