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2nd time cost me 300.00 at dealer. Now have 78000 miles, and warning lights come on intermittently, sometimes 2 or 3 times a day. Not sure what to do...notified dealer at last oil change, but could find no EVIDENCE of malfunction, so nothing done. They also refused to correct problem under warranty. The car has 100,000 mile powertrain warranty still effective. Is it normal to have failures on the throttle body every 35-40000 miles???