Car will not communicate with multiple scanners or smog machines through data link connector. Checked all wire connections at data link connector and back probed and checked all wire connections to the PCM. Checkedpowerand ground connections at PCM and data link connector. Checked chassis grounds. All ok. Replaced PCM twice with used unit thinking original was bad. Both replacements had same result. When pull mass air flow sensor, check engine light should come up but it doesn't. When key on, engine off check engine light is on. Light goes off when started. HELP PLEASE...

 

Did you ever get this fixed? and if so, what was the problem?
Thanks
Eric

 

Don't hold your breath waiting for an answer from thekarshop.He hasn't logged in since he asked the question over a year and a half ago:
https://www.hyundaiforum.com/showProfile.asp?memid=2985