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POSSIBLE CAUSES INTERMITTENT CONDITION PCM TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTC’s. Is the Good Trip Counter for this DTC displayed and equal to zero? All No → Yes → 2 Turn the ignition off. t, actuate the O2 Heater Test. With the DRBIII t, monitor O2 Sensor voltage for at least 2 minutes. Does the voltage stay between 0.4 and 0.6 volt? All Yes → No → 3 NOTE: Allow the O2 sensor to cool down to room temperature. All Yes → No → Replace the O2 Sensor. 4 Turn the ignition off. All Yes → No → Repair the O2 Sensor Heater ground circuit for an open. 5 Turn the ignition off. t, actuate the O2 Heater Test. Measure the voltage of the O2 Heater Relay Output circuit in the O2 Sensor harness All Yes → No → Repair the O2 Heater Relay Output circuit for an open. 81 DRIVEABILITY - GAS P0135-1/1 O2 SENSOR HEATER FAILURE — Continued |