Truck showing incorrect outside temperature

[Eltaco]

Brought mine back in last week, and for a 3rd time they replaced the ambient temperature sensor. And for a 3rd time, my temp is off by 20-25F. How many times do we need to replace the same component to understand it’s not the cause?

So at this point this issue has caused my truck to be in 3x. They’ve replaced the complete driver side mirror, complete driver side door panel (since they broke it when replacing the mirror, and individual sensor two other times.

Does anyone know if there’s a method to input a manual calibration offset? The sensor is clearly working, it’s drifting along with actual air temp, just 20-25F high. If I could input a 22F negative offset, everything would be fine.

To be clear, mine never reaches accurate temp regardless of where it’s parked or how long it’s driven.

 

[yellowboy]

Mine never did / never does either. In my case they replaced the radio 2 times. Dealers are throwing spaghetti at the wall to see what sticks on these issues, even after 2 1/2 years of these vehicles being on the road. Pathetic.

 

[Dusty1948]

Brought mine back in last week, and for a 3rd time they replaced the ambient temperature sensor. And for a 3rd time, my temp is off by 20-25F. How many times do we need to replace the same component to understand it’s not the cause?

So at this point this issue has caused my truck to be in 3x. They’ve replaced the complete driver side mirror, complete driver side door panel (since they broke it when replacing the mirror, and individual sensor two other times.

Does anyone know if there’s a method to input a manual calibration offset? The sensor is clearly working, it’s drifting along with actual air temp, just 20-25F high. If I could input a 22F negative offset, everything would be fine.

To be clear, mine never reaches accurate temp regardless of where it’s parked or how long it’s driven.

Three sensors in a row producing the same results? Doubtful. There probably is a set point in NVM that is already corrupted producing the incorrect value. Or there could be a communications error in the system. If this is beyond the technicians skill level, time for an escalation.

Best regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 03 June 2018. Now at: 044703 miles.

 

[RubyRam]

Brought mine back in last week, and for a 3rd time they replaced the ambient temperature sensor. And for a 3rd time, my temp is off by 20-25F. How many times do we need to replace the same component to understand it’s not the cause?

So at this point this issue has caused my truck to be in 3x. They’ve replaced the complete driver side mirror, complete driver side door panel (since they broke it when replacing the mirror, and individual sensor two other times.

Does anyone know if there’s a method to input a manual calibration offset? The sensor is clearly working, it’s drifting along with actual air temp, just 20-25F high. If I could input a 22F negative offset, everything would be fine.

To be clear, mine never reaches accurate temp regardless of where it’s parked or how long it’s driven.

I feel better now, mine is only off 2-3 degs.

 

[Eltaco]

Three sensors in a row producing the same results? Doubtful. There probably is a set point in NVM that is already corrupted producing the incorrect value. Or there could be a communications error in the system. If this is beyond the technicians skill level, time for an escalation.

Best regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 03 June 2018. Now at: 044703 miles.

How do I go about escalating?

 

[Kicker]

How do I go about escalating?

Drive it into the showroom?

 

[iLikeTurtles]

Lemon law it due to incorrect temperature display. That would be impressive haha.

 

[Dusty1948]

How do I go about escalating?

The tech. could open a STAR case, or they have a number to call for field assistance.

Best regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 03 June 2018. Now at: 044703 miles.

 

[stronbl]

Brought mine back in last week, and for a 3rd time they replaced the ambient temperature sensor. And for a 3rd time, my temp is off by 20-25F. How many times do we need to replace the same component to understand it’s not the cause?

So at this point this issue has caused my truck to be in 3x. They’ve replaced the complete driver side mirror, complete driver side door panel (since they broke it when replacing the mirror, and individual sensor two other times.

Does anyone know if there’s a method to input a manual calibration offset? The sensor is clearly working, it’s drifting along with actual air temp, just 20-25F high. If I could input a 22F negative offset, everything would be fine.

To be clear, mine never reaches accurate temp regardless of where it’s parked or how long it’s driven.

Is your temperature off by 20-25 degrees at all times? The reason I ask is mine is off on sunny days when the sun hits directly on the driver's side mirror. Usually off at most by 10 - 12 degrees. But at night or on cloudy days it's surprisingly close to temperature from other sources (like within 1 degree or spot on), i.e. watch, other vehicles we own, etc. Seems like it is the location on the driver's side mirror that is my issue. Good luck.

 

[Eltaco]

Is your temperature off by 20-25 degrees at all times? The reason I ask is mine is off on sunny days when the sun hits directly on the driver's side mirror. Usually off at most by 10 - 12 degrees. But at night or on cloudy days it's surprisingly close to temperature from other sources (like within 1 degree or spot on), i.e. watch, other vehicles we own, etc. Seems like it is the location on the driver's side mirror that is my issue. Good luck.

Mine is within that same 20-25F error at all times. I park in a garage so my direct sunlight exposures while not driving are pretty minimal. Seems my drift is usually pretty small, just there is a consistent offset.

 

[ramchaser]

There is a known star case for this. They replace the sensor in the mirror. The star case is attached.

 

[yellowboy]

But has anyone had this star case done with success ?

 

[y7eah]

It's worth noting that the ambient sensor part number changed in 2021. The old one is made in China and has a plastic stub that sticks out of the mirror with a small wire lead on it. The new one is made in Japan and the whole stub appears to be metal and likely the sensor. I just installed and will update if it is more accurate. I was seeing temps 5-10 degrees off in the winter and have a 19 Laramie.

2019 Part: 68138681ae
2021 Part: 68457701aa

 

[Rsorrell2]

In my opinion it is only a guess a mate anyway. Depends on if the sun is hitting that side or not. Yes it should be closer to a real temp gauge but it would not be something it would obsess about. I find that it fluctuates when driving anyway.

good luck I hope you get it fixed.

 

[yellowboy]

Thanks to the TSB I got from here my dealer ordered a new sensor for me, I'll let you know if there is any improvement.

 

[yellowboy]

Got the new sensor installed Monday, it's just as INACCURATE as the old one. On to the next unsolvable issue.......

 

[bonebro]

 

[Eltaco]

View attachment 79779

Misery loves company, somewhat glad to see I’m not the only one. These other guys complaining about 2-5F inaccuracy don’t know how good they have it

 

[jchickman]

I’ve only had my used 2019 for about 2 weeks and have noticed 20-30 degree over reporting as well. I hope Ram comes up with a solution since it’s already caused inconvenience with the remote start features.

 

[Eltaco]

Mine was off by 40F yesterday, which was enough to finally flag a CEL.

I’m not sure how the system knew there was a sensor issue, however... as it’s been off by around 25F for nearly a year. Maybe it finally figured out I’m using seat heat and window defrost too much when it’s “70F” out?