Maintenance Required Lamp/Indicator: Service and Repair

A Sensor lamp is located on the instrument panel to indicate proper operation of the oxygen sensor feedback circuit. Every 30,000 miles of vehicle operation, the lamp will begin to flash. When the lamp begins to flash, the feedback circuit should be checked and the lamp reset using the following procedure.

Fig. 6 Oxygen Sensor Indicator Lamp Cancel Switch:

1. Ensure that ignition switch is off, remove fuse panel cover and move cancel switch to on position, Fig. 6.

2. Turn ignition switch to On position and observe Sensor lamp. If lamp does not light (without flashing), check for defective bulb or open feed circuit and repair as needed.

3. After illumination of lamp is confirmed, start engine and run until it reaches normal operating temperature.

4. Run engine at 1500-2000 RPM while observing lamp.

5. If lamp flashes, system is operating properly. If lamp does not flash, a problem in the Computer Controlled Emission Control System may be indicated.

6. After proper system operation has been verified, place cancel switch in off position to reset automatic indicator system.