I bought just a cheap one about two years ago that never would flash the codes. So today I bought a $214.00 autoxray 2500 and it says : unable to read from the vehicle Please verify the key is on.(1993 camaro 3.4 v6)
So I Plug the code reader into 2 other cars and it works. So whats up with mine? Is the plug in my camaro bad or what? Really need to get this thing to read. Please help.
Thanks

 

I have a 1995 3.4 camaro and I had the same problem. My issue is i need an obd1 scanner with an obd2 adapter. If that makes any sense. Have yet to do so but im pretty sure thats your problem.

 

Well, thats what I bought today. It has the obd-1 wire with it. So I don't know what to do.
Thanks

 

I believe you have to by an adapter wire that fits on your obd 1 wire and the other end has an obd 2 plug. Im guessing but im pretty sure thats what you need.