Lancer Sportback L4-2.4L (4B12) (2010)
Oxygen Sensor: Testing and Inspection
HEATED OXYGEN SENSOR CHECK
Required Special Tools:
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MD998464: Test Harness
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MB991658: Test Harness
Heated oxygen sensor (front) [Except vehicles for California]
1. Disconnect the heated oxygen sensor connector and connect special tool MB991658 to the connector on the heated oxygen sensor side.
2. Measure the resistance between terminal No. 1 and terminal No. 2.
Standard value: 4.5 - 8.0 Ohms [at 20° C (68° F)]
3. If the resistance deviates from standard value, replace the heated oxygen sensor.
4. Warm up the engine until engine coolant is 80° C (176° F) or higher.
5. Rev the engine for 5 minutes or more with the engine speed of 2,000 r/min.
6. Connect a digital voltage meter between terminal No. 3 and terminal No. 4.
7. While repeatedly revving the engine, measure the heated oxygen sensor output voltage.
Standard Value