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P0131-1/1 O2 SENSOR SHORTED TO GROUND —
TEST
5
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the O2 Sensor Signal circuit and the Heater ground
circuit in the O2 Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to the Heater ground circuit in the O2 Sensor
→ Go To 6
No
6
NOTE: Before Continuing: Disconnect the PCM harness connector and
check the related wiring terminals for corrosion, damage or terminal push
out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
Repair
ACTION
Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
69
APPLICABILITY
All
All
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