TPMS sensor alert.
 

I took a very enjoyable 120 mile round trip in the Challenger yesterday. After about 40 miles the tire pressure warning light came on for about five minutes. It went off on it's own. I stopped at the first service station and checked all the tire pressures and they were all at 32 PSI. The light never came on again.

RE: TPMS sensor alert.
 

You probably have a sensor about fail or something temporarily interfered with the signal.

RE: TPMS sensor alert.
 

Not sure where you are located, but I've seen in different vehicles when the pressures are set at 32, and you get a cold night, science takes over and you can "lose" a few pounds which will turn on the light. After driven and warmed up, the tires "make" more pressure, and the light will go off. If it was on a cold morning, you can set the pressures to 35 with no issues, if it was while it was warm, you may have a sensor going bad.

RE: TPMS sensor alert.
 

I had my light come on also about a week after getting my R/T . Was on the interstate headed to the dealer for some paper work that needed to be signed. I pulled over and the tire's looked ok . So I drove to the next exit . Was showing 31 on the gauge I had . A new Snap on dial gauge with about a foot of hose. I drove on to the dealer as the light was still on . They aired the tire's up to about 34 lb. It was in the teen's that morning . They said you had to drive a few mile's after airing the tire's up for it to reset . Any way the light went out . They said you have to have 33 lb in the R/T . And light would come on if it dropped below that . They had sold several new R/T Challenger's and said they'd had several come in with the air below 33 . I laughted and said I guess they don't want you to have a low tire at 160 mph. My wife's 06 300 C doesn't come on till drop's to 26 lb. Her light came on a few morning's ago with temp was in low teen's.

RE: TPMS sensor alert.
 

The temp was in the upper 60's and I had driven over 40 miles when my light came on but my tire's are inflated to 32 PSI. This is the PSI. as delivered. My car has 1200 miles on it. The sticker in the door say's 32 pounds for the R/T 18 inch 55's. I agree that a couple extra pounds will not hurt. So I will raise the pressure to 35 PSI.

RE: TPMS sensor alert.
 

My R/T's light comes on at 25lbs. I found that out when my left rear was losing air due to a valve core not being seated. I had to air it up to 33 before the light went out. I am running the rears at 30 for traction and never get the light.

RE: TPMS sensor alert.
 

These things work wirelessly, right? Can they receive signals from other people's cars? I mean, in traffic your receiver can be closer to a neighboring car's tire than it is to your own rear tires if the receiver is positioned under the dash. Or, are they keyed specifically to the transmitters in just your car. That seems unlikely though with the limited number of frequencies available. All moot if the system isn't wireless, though.

RE: TPMS sensor alert.
 

I have the 20's with the optional Good Year all season . But don't know if that makes a difference.

RE: TPMS sensor alert.
 

The system IS wireless. The TPMS sensor is attached to the base of the valve stem. It sends an RF signal to report pressure. When the sensors are first installed (and when they are replaced) the sensors are activated and the computer is programmed to recognize the sensor ID. This is the part that keeps it from reading another car's signal as you are driving alongside. On a system that displays each tire's location and pressure individually, you need to reprogram each time the tires are rotated. For systems that simply set a generic warning light and not position/pressure, you do not have to reprogram after a rotation.

RE: TPMS sensor alert.
 

Good info wagonmaster. This guy is not a rookie;) ^^^^^^

RE: TPMS sensor alert.
 

from what I am seeing the sensors are very touchy. When we got our RT Oct 31 I checked all the info and on the tire pressure page it was 31 31 32 32 never noticed it changing much sometimes 29 30 32 33 sometimes 31 31 31 31. About a week ago I had to get my daughter and it was about 15 degrees out the alarm chimed LOW PRESSURE and they were flashing 30 30 30 30. I picked her up and it was 32 31 31 32 still flashing. I checked the air and filled to 34. the gauge said 33 33 33 34. I havn't had it alarm on me again but keeping an eye on it until spring. Very touchy.

RE: TPMS sensor alert.
 

If you expect the temps to be that cold for a while, go ahead and bump tire pressures up a couple pounds. Remember that tire pressures drop one pound for every 10-12 degree drop in temperatures. Another thing to watch is adjusting tire pressures in a garage that is warmer than outside temperatures. I see this problem at work every day. It's 65-70 degrees in the shop and 25-30 degrees outside. That will make a difference of 3-4 psi after the car is pulled outside. Also remember to check the tire pressures before driving. As you drive, the tires will warm up and increase pressure by a few pounds.

Personally, I hate TPMS. I am still trying to figure out a way to mount all four TPMS sensors in a spare tire so I can run regular valve stems on the four road wheels and not set off the TPMS warning light. Mounting the sensors to a wheel is easy, but mounting them in a way that still allows mounting the tire to the rim without damaging the sensors is the trick!

RE: TPMS sensor alert.
 

I gotta agree: This is something I would rather do without. Admittedly, it might be useful on an SRT or an R/T where you're actually likely to race the car, but on an SE? Give me a break. The SE's good, but I don't think you're going to run the risk of shredding the tires off the rims even if the air pressure is low when you go off the line. ;) To me, it's just another annoying electrical device that can go wrong.

RE: TPMS sensor alert.
 

I was told that all you have to do after a tire rotation is to drive above 15MPH for a few minutes and the receiver would learn the new location. No re-programming necessary. Dodge vehicles after 2004 were supposed to be set up that way. The owners' manual doesn't say anything about reprogramming in the areas about TPMS or tire rotation. So, I can't point to you anywhere to go and find out for sure.

RE: TPMS sensor alert.
 

didnt know about the auto reprogram, make sense though (Great Info). For you really smart people that understand Elec Lingo, I believe there is a page in the hidden EVIC program where you can adjust the minimum warnings, I dont understand all the lingo in the hidden programs, but someone may want to check it out. See the EVIC info needed thread on how to find the program if you dont already know.

RE: TPMS sensor alert.
 

What's the curb weight of the SE? And if you're running the all season tires with softer side walls which heat up more the risk increases. Honestly, I don't like the added complexity of the electronics. I just wish they worked better and more dependably.

RE: TPMS sensor alert.
 

Temperature has been dropping here as well. I got a alert that both of my left tires were low. I went to the station and topped them off, but the alarm took several minutes to register the change and go away. Does anyone know how often the sensors update?

RE: TPMS sensor alert.
 

I agree TPMS sux. I am headed back to the dealership this morning with my original 18 inch wheels so that the TPMS senors can be removed and installed in my 20 inch OEM, chrome clad wheels. I know I have posted this before, but the TPMS sensor from the 2008 Dodge Charger with 20 inch wheels will not work with the Challenger. The part numbers are completely different and if used they will trigger the dreaded tire sensor light and it will stay on whenever you are driving.

RE: TPMS sensor alert.
 

Obviously, there is only one solution to this whole problem: Disconnect the TMPS light. :D

RE: TPMS sensor alert.
 

The curb weight is listed as 3720.