Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR system, it is a good idea to replace the oxygen sensor because it works in tandem with the EGR system.
Replace Oxygen Sensor When Servicing EGR System on Toyota Pickup
Average mileage: 259,000 (218,000–300,000)
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what does a fan sensor do on 93 t100 which is located in the back next to fire wall next to the thermostat sensor
i stil have not found da problem it has no power ive replaced everthing but da mass air sensor could someone help me its a 3.o efi automatic 4 wheel drive emailis firstname.lastname@example.org thank u