I also have the same problem, but with my 04 Dodge truck. Works fine but about every 5 - 10 minutes my speedometer and tac turn off then back on. Less than one sec. And sometimes low fuel beep, beeps. I think that there is some feedback through the 12v system. I found this site while looking for my problem. I was hoping to find a solution. But now I think that what is needed is a electrical filter on the power to the PXDX. Good luck on finding a fix. If you do please post it here and I will do the same.
Thank you,
ray
