Sportage 2WD L4-2.0L DOHC (1996)
Oxygen Sensor: Testing and Inspection
Inspection of Terminal Voltage for the Front & Rear Heated Oxygen Sensor
1. Warm up the engine to normal operating temperature.
2. Run engine at idle speed.
Front Oxygen Sensor
Rear Oxygen Sensor
3. Connect a voltmeter between terminal 4 (BLK wire) and ground.
4. Increase and decrease the engine speed quickly several times.
5. Verify that the meter reading varies between 0 - 1.0V.
*
NOTICE: Rear oxygen sensor voltage does not fluctuate as quickly as front oxygen sensor.
6. If not as specified, inspect:
-
On-board diagnostic system
-
System inspection
-
Intake manifold vacuum
-
Fuel line pressure
7. It all the systems are normal, replace the heated oxygen sensor.
Inspection of the Front & Rear Heated Oxygen Sensor Heaters
1. Ensure the ignition switch is OFF.
2. Disconnect the heated oxygen sensor connector.