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The computer has detected a problem with the emissions system. If you are talking about a mid-late 80s Suzuki Samurai the answer could be much simpler, just an automatic 'engine light' warning based on mileage. The Samurai's would turn on the check engine light every 50000 or 60000 miles. There was a simple two position slide switch under the dash to reset it. When the engine light would come on, I would remove the lower dash panel, feel down around the right side of the steering column, find the switch, and move it to the 'other' position. Voila, engine light would stay off for another 50-60k miles, and then I'd repeat the reset procedure again. I THINK the reason it was setup like this was that was the routine maintenance time for either the EGR or PCV valves. In any case, that worked on 1986 through 1988 Samurai's, and maybe more. always close gaz cap properly...and tigh... on many cars, it is enough... r.p montreal. The engine light will come on if your Air Filter is dirty or plugged. Replace your air filter, then disconnect the negative terminal on your battery. Wait a minute, then reconnect the negative cable. You need to remove the negative cable just to cause the computer to reset and clear the error. Kind of like the 3 finger salute for Windows (Ctrl-Alt-Del).

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Q: Why would the check engine light be on in a Suzuki?
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