My 2000 TJ 5-speed with 68K miles displayed a check engine light while driving it today and there is no difference in how it runs. I have connected both a 5 year old Bosch code reader and a brand new Innova reader and both display error messages trying to download the codes. Any ideas as to the problem? This is originally a Canadian market jeep that was sold new in Calgary, Alberta. It has zero modifications and I have had had no problems with it since I bought from the 2nd owner last October. Thanks in advance.