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					Originally Posted by Mike A  I'm not endorsing not to have you car checked.  I am driving a 98 jeep, the check engine, air bag, oil, and about all other lights have been coming on for about 5 years, no problems so far.  Initially had my mechanic, not a jeep dealer, check for problems, didn't find any show stoppers. Usually only 1 or 2 come on at a time, not every day.
 When I changed the battery 2 years ago, no change in the lights coming on.
 
 The best one was when the cruise control light came on, the jeep has no cruise control.
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 In most older cars, you can drive them for years with the check engine light on.  It's when the light starts flashing that you have a problem that CAN'T be ignored.   If it's an oxygen sensor, or a catalytic converter issue, you can reasonably ignore it.  But it makes sense to find out what the problem is first.
I had a Mazda some years ago with the check engine light on for years.   Finally, I decided to handle the issue with a well- placed piece of duct tape on the dashboard.  Voila, problem solved!