DTC P1C4E and some weird electronic stuff.

[desertbenny]

Just had an interesting experience tonight on the way home, well I think it may have started a day or two ago but tonight was all new. Tonight while driving home the check engine light comes on followed by the speedo going dea, all warning lights coming on and service ABS, trailer brake, park sense and auto start disabled. Lasted for about a minute and everything went back normal except check engine light. Now the other day I get a CEL and the code P1C4E. Depending on the forum it's either an informational code or an ABS code. Then i started noticing weird glitches. Get a blue screen for about 5 seconds after shifting out reverse. Auto on features don't come on with start. I'm going to give the U-connect update a shot in the morning.

My question does this sound like a speed sensor issue? Any other ideas or advice.

Thanks
2014 Powerwagon

[DocPaulo]

Dont know if this applies but with the newer cars they are very sensitive to voltage drops... ive experienced this in multiple cars... codes that make no sense... and dont return after i clear them... a real problem code will return after clearing it its a real issue...

Usually a sign its time for new batteries...

[stooper]

that code only refers you to abs module fault code. You need to read abs codes.

[DamageWagon]

First guess is a bad battery or PCM, but I would lean towards battery. Like DocPaulo said, bad voltage makes the computer start playing Pac-Man

[desertbenny]

Lol I think I found it, It turns out that when I removed my old offroad lights, I had to loosen the main ground stud right behind the battery. Put the new LED lights on and ended up using a different ground and forgot to tighten the stud. The was just enough play to lose contact if you moved the wire.

[olyelr]

That’l do it! Good find!

[FordyceCreekTrail]

Funny how its usually something simple.(except on new Raptors) With the era of Monteros people used to do all the ghetto 80s and 90s after market alarms on them. So you would always get "it just quit on the drive home" posts....do you have an aftermarket alarm? ...theirs your problem.

These days it does not take much to make dash lights go nuts. Badly leaking exhaust manifolds did it on my Titan. When the mechanic told me that I said he was crazy...sure enough it was. I had dash lights, cruise control cutting in and out, you name it