codes

I have a 2003 Jeep Liberty 3.8 Automatic and am not able to pass my state inspection as the computer shows that both O2 and catalytic converter "readings" are not clearing. They DO NOT show any error or code, they show nothing. The recommendation from the shop was to drive some more, with...

So running my 05 KJ the other day (200k on body/100k on engine) up a serious mountain in my area (3,200 ft) and quite step slope about 3or4 miles, my cruise set on 70mph, a/c running wide open bc it was 90some degrees and humid as all get out, stereo pounding and signing along and she just shuts...

So my 2002 jeep liberty limited sat for 2 years before i bought it. it was garage kept. i bought it for 1000$ so im not upset with everything that is wrong with it but i cant quite figure out why it keeps throwin codes. first it started with the coils. 4 diff coils went out. i bought all new...

I have searched the web and this forum. Those listed don’t work for my 2009 Jeep Liberty. Is there a way to read the codes without a reader? Thanks! Mark