Ford explorer will not start after replacing computer ECM ?

When you replaced the computer did you have it programmed for your Explorer.Anytime you replace the ECM/PCM (computer) it has to be reprogrammed for the truck its going into in order for the Pats (anti-theft ) can read the keys. You are going to have to have this done at the dealer.

Once its reprogrammed,then only it will except the keys and car will start as normal.

This will help.

Thanks.

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