You need to have someone read the PCM codes. In my area the
Autozone Auto Parts stores will do it for free. Once you
have the codes, you can go to one of the many online OBDII
Code lists to get an idea where the problme might be. See:
It could be something as simple as a loose gas cap. If the
check engine light is flashing, you have a problem that
needs immeadiate attention.
You should consider joining the Expedition Owners Mailing
List - see
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