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Symptom List: P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P0031-O2 SENSOR 1/1 HEATER When Monitored and Set Condition: P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW When Monitored: Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is on. Set Condition: Desired state does not match Actual state. P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH When Monitored: Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is off. Set Condition: Desired state does not equal Actual state. P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW When Monitored: Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is on. Set Condition: Desired state does not equal Actual state. P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH When Monitored: Battery voltage above 10.6 volts, ASD is powered up, and O2 heater is off. Set Condition: Desired state does not equal Actual state. POSSIBLE CAUSES O2 HEATER TEST O2 SENSOR HEATER ELEMENT (K342) FUSED ASD RELAY OUTPUT CIRCUIT HEATER CONTROL CIRCUIT OPEN HEATER CONTROL CIRCUIT SHORTED TO GROUND PCM 23 DRIVEABILITY - GAS |