p0370/u1800 HELP!!...(scanner codes)

Duramax'n

Duramax'n

New member
Sep 9, 2008
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Aloha
Hi,

I was recently coming back from a short trip when my truck just stopped running on the hwy....My first though was the fuel filter since it has been 14,000 miles since my last one...to make a long story short, I replaced it and it quickly fired back up...I took it for a test drive and all was fine....The next day I get in it to go to the store and it fires right up...I then get home and turn it off, go in my house and open my garage..Then I get back into my truck to back it up to get my boat out, and it will not start!!..

I got one of those scanners and it came up with 2 codes...1st: P0370 and the second : U1800...for the first code it means timing reference resolution signal A malfunction...Now I have asked auto shops and even googled it but I have no idea and could not get an answer for what that means...So can someone help me?...What part are they talking about?

Thanks so much...

P.S. I have a fishing trip planned real soon and I am hoping to get my truck running again, so any info helps....
 
Last edited:
L

LBZrcks

.........
Jun 2, 2007
5,297
12
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38
SoCal
U1800 "Lost Communications With FICM"

What do you have done to your truck? try filling out a signature:)
 
Duramax'n

Duramax'n

New member
Sep 9, 2008
7
0
0
Aloha
Ok, so I was told from some people to check to make sure the wiring near the fuel filter is not worn through and touching the engine which would cause a short.....Sure enough that was the problem....I fixed all the wiring around the engine and re-taped all of it....The truck now fires right up and the check engine light is gone.....It was all caused from a short, which makes sense with the fault codes I was getting...:rockon:

Thanks.....
 
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