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On board computer problem

2K views 1 reply 2 participants last post by  Johnny Mullet 
#1 ·
I took my 97 Ford explorer to get smog checked. It failed. The mechanic send my computer was dead. It wasn't responding and i will need to have it replaced. I need to know what computer he is talking about. Is it the powertrain computer or the ECM (engine control module)? Also...where are these two devices located? Can I replace them myself?
 
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