P0131

Tests 143 - 147:

SYMPTOM
P-0131 O2 SENSOR 1/1 VOLTAGE SHORT TO GROUND

WHEN MONITORED
With engine coolant temperature above 170 degrees F on the previous key on, after a cold start, engine coolant below 98 degrees F, and ambient/battery sensor reading within 27 degrees F of engine coolant.

SET CONDITION
The oxygen sensor signal voltage is below 0.156 volts for 28 seconds after starting engine.

POSSIBLE CAUSES
- O2 sensor defective 1/1
- O2 sen signal circuit short to ground circuit 1/1
- O2 sensor signal circuit short to ground 1/1
- PCM defective