Outside Temp still wrong...what can it be?

[MegaCab1Ton]

I've done a lot of research about the Outside Temp displayed in the overhead console. Mine was reading all over the place (like 60 - 70 degree swings over a couple minutes). I've replaced the sensor (twice!) and had the dealer verify the ECM isn't missing any updates based on a TSB that I found (it is current). The stupid temp is still 20-30 degrees low (but it isn't doing the wild swings like it was).

The sensors I installed are Duralast. Should I buy a genuine Mopar one? If yes, anyone have a part number? I'm not having any luck finding one online. Truck in question is my '06 3500 with 5.9 Cummins.

It is stupid this trivial little thing is bugging me but it seems like this should be a simple fix! The wiring harness looks fine and I used some dielectric grease when I installed the Ambient Air Temp sensors.

 

[MegaCab1Ton]

Well, I guess my next step will be to get a genuine Mopar sensor and see if that will make a difference. I doubt it but they are cheap so I'll give it a try... UPDATE: Picked up a genuine Mopar ambient air temp sensor (along with some replacement dash light bulbs) and installed it along with a battery temp sensor. Cleared the codes, now wait and see if it continues to throw codes and to see if the temperature is correct once I start driving it.

I also changed the burned out HVAC light bulbs and the bulb that lights the floor console. Pretty simple job once I figured out how it all comes apart.

 

[dezznutzz]

Did it fix the problem?

 

[MegaCab1Ton]

Third time is the charm! I installed the Mopar ambient temp sensor and it now is within 4 degrees of actual temp. I'll call that close enough. The Duralast sensors are going in the trash.