SX4 4WD L4-2.0L (2008)
Oxygen Sensor: Testing and Inspection
Air Fuel Ratio (A/F) Sensor On-Vehicle Inspection
Air Fuel Ratio (A/F) Sensor On-Vehicle Inspection
Heater
1. Disconnect A/F sensor connector.
2. Using ohmmeter, measure resistance of Sensor heater between terminals "VB" and "GND" at sensor connector. If found faulty, replace A/F
sensor.
NOTE: Temperature of sensor affects resistance value largely. Make sure that sensor heater is at correct temperature.