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diagnostic fault codes

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fuel pressure electric sending unit

Ez Box ?

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I read that I could turn my key 3 times and the dianostic faults would show up if any. Well I got PCU 1653 and ECU 0522. Does anyone have a method to find out what these are? My truck has been running a little flat lately. I thought is was just the weather... maybe not.

:eek:
 
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