I have an 04 4200 with the VT365 engine. Runs and drive great but has a SES light on. I figured out how to get the codes through the dash and it shows it having a 639_14P 228:254, 639_14P 4:240, and 639_14P 241:254. From what I can find all these codes are related to no engine speed signal to the ESC. Anybody out there have an idea what could be causing these codes or know of a source where I can find a wiring diagram? Any help would be appreciated.
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