If the automatic transmission does not shift properly and the Check Engine Light illuminates, the speed sensors in the transmission may have failed. The sensors are simple and inexpensive to replace.
Problems for specific Hyundai Elantra years:
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Most reported 2000 Hyundai Elantra problems
Prior to replacing the automatic transmission fluid (to improve shift quality), make sure that the transmission fluid level is correct. Also, make sure the computer that controls the transmission has the most up-to-date adaptive programming information. When servicing these transmissions be sure to use fluid approved by Hyundai.
My power windows won't work. Power locks function well but the buttons for my windows won't.
This is more of a nuisance than a severe mechanical problem: my headlight lens both have filmed over. Light output to the road has decreased as a result. I checked out numerous headlight lens cleaners and polishers, but nothing guaranteed a solution. I saw that some kits contained a high grit sandpaper. I decided to experiment, as my lights couldn't get any worse, and used some Bon Ami on a wet cloth and rubbed the lens vigorously. It wo...