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Symptom List: P0130-1/1 O2 SENSOR HEATER CIRCUIT MALFUNCTION Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P0130-1/1 O2 SENSOR HEATER When Monitored and Set Condition: P0130-1/1 O2 SENSOR HEATER CIRCUIT MALFUNCTION When Monitored: Ignition ON, with battery voltage greater than 10.4 volts. Set Condition: The state of the PCM relay control circuit, between the PCM and relay coil, does not match the desired state. P0136-1/2 O2 SENSOR HEATER CIRCUIT MALFUNCTION When Monitored: Ignition ON, with battery voltage greater than 10.4 volts. Set Condition: The state of the PCM relay control circuit, between the PCM and relay coil, does not match the desired state. POSSIBLE CAUSES WIRING HARNESS INTERMITTENT OPEN CIRCUIT BETWEEN RELAY AND FUSE OPEN CIRCUIT BETWEEN RELAY AND PCM SHORT TO GROUND BETWEEN RELAY AND FUSE OPEN FUSE TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTCs. Is the Good Trip Counter displayed and equal to zero? All Yes → No → 2 Turn Ignition Off. All Yes → No → 69 DRIVEABILITY - GAS |