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I went to the codes section but these are not listed over there 0628 0529 0541 0483 I was just told that all this # start with a P so I guess they are pcm codes

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I went to the codes section but these are not listed over there 0628 0529 0541 0483 I was just told that all this # start with a P so I guess they are pcm codes

0628 - low voltage detected at the fuel lift pump 0529 - ? 0541 - low voltage on the no. 1 intake air heater relay 0483 - Fan speed

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On the 0529 could that be the 0629 - High voltage detected at lift pump.0628 - Low voltage detected at lift pump.These codes might be in relation to each other.

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Problem is that OBDII standard where suppose to be generic from 0000-0999 then model specific from 1000-9999. But it didn't quite work that way. So without knowing a lot about the truck or vehicle the codes are coming from make it hard for me to look up. Basically did a search on my site for the codes and they popped up in the 3rd Gen (assuming this is the vehicle)

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Sorry about all that, my friend called and said he had a customer broke down outside his gate and was just trying to get him going. We didnt know much until now, it is a 02 dully 5 speed but anyway I think they did something with it.

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