H8GAS

I got in the truck yesterday and was driving in about 90* outside temps. I looked at the overhead and saw that the temp gauge read 58* outside. I tried switching the computer between settings and each time when I went back to the gauge/compass setting the temp read 58* . When I got to where I was going I got in the truck and started it up, 58*! Anybody see this before? I have to get this fixed ASAP. I commute with two guys that own Duramaxes and I can't let them see the slightest problem with my truck or I'll never hear the end of it.

07Blue2500

Sounds like the temp sensor has gone bad, or there's 'resistance' in the line due to bad/corroded connection.
Either will cause same problem, and hard to deteremine which is cause.
Start by unplugging/plugging connector near sensor in grill area. After that trip to dealer is probably only fix

surfram

There is a procedure in the owners manual for resetting the overhead display. This may cure it.

jrussell

I've noticed mine will stick after going through a carwash. It sticks anywhere from an hour up to 1-2 days sometimes. That's the only time it seems to stick and when it's working it works really well.

Just put the overhead reading on MPG instead of temp and your buddies won't have anything to razz you about.

Thundercloud

Unless you are getting crappy fuel mileage . Mine has done this recently too, overhead stuck on 58*, but the next day it was fine. So where exactly is this sensor under the hood located?

jrussell

It's between the radiator and driver side headlight, just behind the grill. You'll know it when you see it.

texasram2500

Mine did the same thing about a month ago. It was around 60 outside and my temp on overhead read -40. After about 30 min I watched it move back to the right temp. Hasn't done it since. Haven't thought too much about it till I read this.

ssandlin

There is a TSB out for this, http://dodgeram.info/tsb/2006/08-026-06.htm

Mine was reading the -40, so I had the flash done and now it's fine.

wreedCTD

yep there is a flash.

Thundercloud

Thanks jrussell.

iaddiesel

Yep. Mine did it over the winter when I went thru a car wash and it was like 15 deg. outside. It eventually came back after a few days, however I did unplug the sensor and plug it back in, don't think it came back that instant but not long after that. Hasn't done it since, and I always watch it now if I go thru a wash.

H8GAS

Thanks guys. I'll try to unplug it and plug it back in first, I just didn't know where it was located. If all else fails I'll go to the dealer for the reflash but I avoid them if at all possible.

H8GAS

Sorry it took a while to get back to the guys that offered help...I got in my truck two days later and the temp gauge was fine. I hope to not have to take it to the dealer for the flash, maybe it was a one time deal. Thanks again.

ssandlin

As an FYI, mine was not a one time deal, it happened several times before I finally took it in and had the TSB done. Good luck.

Crankpot

Mine stuck at 66 deg for two days after a battery disconnect, then mysteriously resumed normal operation.

CP