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The skinny on the sensor light is that on models with a reset switch under the passenger side kick panel, the sensor is triggered by a mileage counter in the speedometer. After 90k disconnect it. It's not telling you anything other than a reminder to have your system checked.
On '88 and later models without the reset switch, the sensor light is triggered by the ECU when it detects a problem in the emissions system. Usually a plugged/bad EGR or O2 sensor.
The gas sensor system is the "Exhaust Gas Sensor" aka O2 sensor.
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187-A Extended Bowery Street__________22 Potomac Lane
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