Detail: In my friend's Elantra 2001 (he does'nt have Internet) the trouble light goes on while hot weather and then engine is loosing its power. Can you tell the cause of this problem? Thank you Paul.
Solution: I have one other suggestion, clear all the codes and drive the car until the check engine light comes on, then rerun the test, , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!