|
|
|
Symptom: P0141-1/2 O2 SENSOR HEATER FAILURE When Monitored and Set Condition: P0141-1/2 O2 SENSOR HEATER FAILURE When Monitored: During vehicle shutdown after the vehicle has been driven for greater than 10 miles with the throttle open for a minimum of 3 minutes. Battery voltage greater Set Condition: O2 sensor continues to rise, (instead of fall) after the diagnostics has turned the ASD relay back on. Two trip fault. POSSIBLE CAUSES O2 SENSOR HEATER OPERATION O2 HEATER ELEMENT O2 SENSOR HEATER GROUND CIRCUIT OPEN ASD RELAY OUTPUT CIRCUIT OPEN PCM TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTC’s. Is the Good Trip display and equal to zero? All Yes → Go To 3 No → Go To 2 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 volts? All Yes → Go To 3 No → Refer to the INTERMITTENT CONDITION symptom in the Driveability category. 75 DRIVEABILITY - SBEC |