2004 Expy EB code u1900, Traction control light on, Check Advantrac

[Zidjan]

Hi Guys

I did a search on the forum and I found nothing that's specifically pertains to my issue.... My 4x4 high and low is flashing every minute or so, I lost my 4wd, nothing happens when I switch from 2low - 4 low, no traction control, felt like abs gone too....I scan the code with my scanner and shows U1900...My traction control light is on .... I googled it and found some guys that has the purple wire issue....so I opened my kick plate and the cable harness looks fine...nice and dry ...so I wonder what is the next step to check? other than my 4wd, abs and traction ...everything else works fine ... I do have a P0316 code, a misfire but that's a diff problem for a diff time I am assuming...thank's guys

 

[Josh_unknownissue]

im having the same issue now , and so far ive still found nothing

 

[Docicee]

I too am running into the same issue, has anyone figured out a fix?

 

[whtbronco]

I'm not familiar with U1900. AllData shows the following:


Based on that I suggest you have a faulty module or wire issue. Good luck tracking it down.

 

[riphip]

hose work off of vacuum I believe. Check vacuum hoses at at wheel hubs, underframe, etc for rotting & deterioration