check engine light on and off

Asked by May 19, 2014 at 11:30 AM about the 1990 Toyota Pickup 2 Dr SR5 Standard Cab LB

Question type: Maintenance & Repair

check engine light comes on and off .Mechanics  said it was low coolant but it comes back on and of f.happened before but was oxygen sensor where is this sensor and can I change it  myself

1 Answer

257,915

Low coolant won't make the CEL come on. O2 sensor could be one of many problems the light comes on, but why not scan for codes before guessing and replacing parts?

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