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Originally Posted by Davescort97
I need some information about the CEL. I have been told there are soft codes and there are hard codes. Soft codes have only occurred once and no longer exist. I've been told it takes 40 cycles of starting your car to erase a soft code. Or, you could take the negative battery terminal loose for 15 minutes to make the light go out. A hard code is when a malfunction occurs and is ongoing. It can be erased, too, but will come back on. Does anyone know for sure about these things? My Haynes manual says you should not erase codes this way on 1.9 engines. I wonder why not? Many times it is specified to take the negative terminal loose before doing various things to the car. What's the difference?
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Dave.
The soft codes are the ones that havent triggered the check engine light. They are accesable when you use the code reader. The hard codes are ones that have triggered the light. In my experience if the problem is corrected the light will usually reset itself in about 3 days or so. Those numbers of 40 cycles seem high. I have had my 96 since it was new and only had 2 codes show. One for the egr valve flow, another for the vent for the fuel.
Ralph