I have a 2003 ford expedition xlt and it turns off on me while I'm driving?

I already changed the gas filter but i was wondering if it can be the relay or something else?

Camshaft position sensor

Well heres the deal, your going to have to troubleshoot. Do wiring harness wiggle test, ecm slap test, etc. Might help to run a diagnostic tool using real time feature, then using freeze frame just when it dies. If your fuel delivery climbed, it was probably an ignition related problem(calculated load and or fuel pressure). If it was a fuel issue, id bet the computer tries to increase load and change your timing.
your gonna have to get creative, or wait for it to get worse.
if you decide to see a mechanic, don't settle on just some tech, you want an electronic/troubleshooting specialist! There's no badge differing that tech from the parts changer, so do your homework.

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