Chrysler PT Cruiser 2001 Service Manual Supplement page 2530

DRIVEABILITY - GAS
Symptom List:
P0131-1/1 O2 SENSOR SHORTED TO GROUND
P0137-1/2 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 -3°C (27°F), and engine coolant temperature above 76°C (170°F) on
the previous key off.
Set Condition: The oxygen sensor signal voltage is below 0.156 volts for 5 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 -3°C (27°F), and engine coolant temperature above 76°C (170°F) on
the previous key off.
Set Condition: The oxygen sensor signal voltage is below 0.156 volts for 5 seconds after
starting engine.
O2S SIGNAL CIRCUIT SHORT TO GROUND
O2S SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT
WIRING HARNESS INTERMITTENT PROBLEM
O2 SENSOR
PCM
TEST
1 Turn the ignition on.
With the DRB, read the DTC's.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Go To 6
No
POSSIBLE CAUSES
ACTION
70
APPLICABILITY
All