I went to the local oil change place, and i tried reading the check engine codes off my o4 ecu, but their unit just claimed err and wouldn't read it.....
Long story short is there a difference between odb 2 readers?
Thanks
Not sure but the one(s) at Autozone have worked great.
Some readers read all cars....even some of the inexpensive ones. Others require different "modules" for different cars. TG
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