2012 Ram Sport gauges go crazy and throws P0480/P0481 codes

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mrtosh

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On the 4th my truck decided to make the gauges go dead(except the speedo) and have every light come on on the dash. If i shut the truck off and restart it the gauges work as they should and it leaves the CEL on. It's done it 3 times since and will shut off the AC as well. It leaves the two codes which are for the fan control circuit 1 and 2. It has been 110*+ here the last couple days but I don't see that as cause for the pcm to flip out like it has. It's going to the dealer today. They assume it needs a pcm flash but I'm having them do a full diagnostic on the fan relays and such. Here's a video I took this morning of the issue. Not something that should be happening on a 2 month old truck with 550 miles on it.
https://www.youtube.com/watch?v=sRSiIMFOsPw&feature=youtube_gdata_player
 

MADDOG

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Well that sucks. But electronics can go bad on almost anything. It may be a loose connection at the PCM or the FCM. Hopefully they can sort it out. Let us know how it goes.
 
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mrtosh

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Will do. I took it in and it's throwing 3 pages of communication and error codes. It could be anything from a frayed wire to a bent pin on a connector. Over 500 ft of wire on the truck so it may take a while the tech was saying lol.
 

quietpeen

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sucks hearing stuff like this, but unfortunately it does happen. Thank god for warranty...lol
 
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mrtosh

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Got a call from the service writer on Monday they could replicate the issue by pulling on the main harness that goes through the firewall. They said there was a bad pin on the harness under the dash and would have to order a whole new harness. 3-4 days out of course... They also have to remove the dash to install said harness. Praying that it is put back together with no rattles.
 

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