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Symptom List:
P0131-1/1 O2 SENSOR SHORTED TO GROUND
P0137-1/2 O2 SENSOR SHORTED TO GROUND
P0151-2/1 O2 SENSOR SHORTED TO GROUND
P0157-2/2 O2 SENSOR SHORTED TO GROUND
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0131-1/1 O2 SENSOR SHORTED
TO GROUND.
When Monitored and Set Condition:
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.
P0137-1/2 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.
P0151-2/1 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.
P0157-2/2 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.
O2 SENSOR BELOW 0.08 VOLTS
POSSIBLE CAUSES
67
DRIVEABILITY - GAS
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