Question about 1993 Saturn SL

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I have a 1993 Saturn SL that the service engine soon light comes on after driving at highway speed for 3 or 4 minutes. It goes out after not maintaining hiway speed. When I go to check for codes the cooling fan comes on and it just flashes a 12 repeatedly. What's up with it? Greg

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It seems like it almost has to be one of two things. Either it's getting a little hotter than it thinks it should or it thinks it's not getting the right air fuel mix at those speeds. If, after slowing from hwy. speeds, the light lingers for a little, then goes out, I'd investigate option 1. If it goes out pretty much as soon as you let off the gas. Option 2. If you're pursuing the heat issue, flush the radiator thoroughly. Make sure the fan is working right.
Engine lights can be finicky. If the car runs fine and doesn't seem to be having any problems other than the light, it might be nothing important.

Posted on Nov 17, 2009


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