P0137

Test 1:

Test 2 - 6:

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
Engine running for 119 seconds. Coolant temperature above 80 °C (176 °F). Vehicle speed greater than 40 mph. Two trip fault.

SET CONDITION
The oxygen sensor signal voltage is below 0.078 volts for 61 seconds after starting engine.

POSSIBLE CAUSES
- O2 sensor heater operation
- O2 heater element
- O2 sensor heater control circuit open
- O2 sensor heater control circuit shorted to ground
- ASD relay output circuit open
- PCM