[Edit] 
Answer
try disconnecting the battery leave for 30 minutes then reconnect should reset fault code causing problems
Answer
Check out the O2 sensors.might be bad, or not connected
First answer by ID1367421509. Last edit by Generaljon. Contributor trust: 68 [recommend contributor]. Question popularity: 62 [recommend question]
Answers.com > Wiki Answers > Categories > Cars and Vehicles > Asian Cars > Hyundai > How do you reset the check engine light on 2001 Hyundai?
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