1985 Toyota 4Runner check engine

your son may have gotten the wires really wet. try disconnecting the battery , leave it off for a while then reconnect it. The computer might reset itself, if not have it scanned to find out what the problem is.

Well, my brother has an 86 Hi-Lux and I have an 86 4Runner. His check engine light has been on for about 6 years and mine for about 4. Both trucks run fine. They are both subject to heavy offroad use. Sometimes the check engine lights go off for a few days, but they keep coming back on. We have tried numerous checks, but neither of us have any computer diagnostic problems. Neither truck uses or leaks oil, so I don't know what to tell you. I guess if I owned a chevy or a ford and the check engine light came on, I would be scared, but since I have lived with it for 4 years now, I am not worried as I have owned toyotas for 22 years and only had to call a tow truck once.

sometimes the sensors can make the engine light go on. most of the time it is something minor. but sometimes it could be a major problem. if you hear any weird noises or knocking it should be checked. If you have had it happening for 4 years then it has to be a minor thing