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Re: computer fuse?
what year is your truck?
Which modules are you interested in? ecm, tcm, bcm, sir, abs...etc.
some code readers and only read generic powertrain codes (identified by p0XXX) and not manufacturer specific codes or any module codes outside the powertrain.
usually you would get a U-code if a module is not communicating or not powered. A code that a reader most likely can't read.
some of the new vehicles have over 30 modules hence the upgrading of factory scan tools as the old factory tools can handle all the modules.
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