[miklec]

Just some information that I observed while doing some work on my 2004
V-10. The shop that I work for has heated floors. There are pipes going through the cement. If one tire is over one of these pipes and one is one the colder cement you will get a TPMS error. Once the temps have normalized the errors will go away. Just thought it was interesteing and decided to share.

 

[noobytoogy]

Cool! Or should that be "Hot!"

Interesting observation. It's these kind of things that lead to inventions like the microwave.

Some British technicians during World War II were working on this new fangled thing called radar.

One of them noticed that if he put his mug of tea on top of one of the bits of kit it warmed the tea up.

Yep - microwaves!

Unfortunately no one thought to patent it - well, they had a war to win so they just drank lots of hot tea!!

 

[grohgreg]

It's a personal choice, but I'm betting you can get rid of those TPMS alerts if you'd switch to nitrogen in the tires. I was surprised at how relatively inexpensive it was. For $28 I got
a. all four tires purged twice, then refilled with nitrogen to the prescribed 33/38
b. 4 cute little blue valve stem caps to tell anybody checking tire pressure that there's nitro in'em
c. 1 year free top up service.

//greg//

 

[miklec]

It's a personal choice, but I'm betting you can get rid of those TPMS alerts if you'd switch to nitrogen in the tires. I was surprised at how relatively inexpensive it was. For $28 I got
a. all four tires purged twice, then refilled with nitrogen to the prescribed 33/38
b. 4 cute little blue valve stem caps to tell anybody checking tire pressure that there's nitro in'em
c. 1 year free top up service.

//greg//

Greg, That could be. I believe it is most likely that the computer that monitors TPMS can not reconcile the difference in temp readings between the four tires. if three are showing 70F and the other 80F then it does not make sense to the computer. The screen showed three of the tires OK and one with an error.

 

[NKAWTG]

For some of us who have all-terrain tires and do offroad work, often air down our tires. In our case nitrogen would be a waste of money.

 

[grohgreg]

For some of us who have all-terrain tires and do offroad work, often air down our tires. In our case nitrogen would be a waste of money.

Especially when you live in an area that seldom gets below freezing. Nitrogen is really a cold climate solution to the semi-annual TPMS aggravation. Folks in warm climates don't know what we're talkin' about.

//greg//

 

[grohgreg]

TPMS can not reconcile the difference in temp readings between the four tires.

TPMS only reads pressure. Temperature isn't even in the equation. Each rim has a little device that constantly monitors the air pressure inside, then sends that data to the computer. The computer then compares the reading received with the recommended pressure threshold specific to that vehicle/tire combination. When pressure drops below threshold, the TPMS simply alerts you to find out why.

I don't see where entering temperature into the algorithm would achieve much. Most folks who've gone through driver training already understand that low tire pressure is associated with decreased fuel economy. Yet an over-zealous government thinks we're too stupid to check the air in our own tires, so they mandated that the car manufacturers do it for us - which by the way, raises the sticker price by $500 or so. Feeding the car computer the individual tire temperatures would almost certainly raise the sticker price even more. But to what end? The bottom line is that the nanny states want us to keep the tires aired up for fuel economy - regardless of the temperature.

//greg//

 

[miklec]

TPMS only reads pressure. Temperature isn't even in the equation. Each rim has a little device that constantly monitors the air pressure inside, then sends that data to the computer. The computer then compares the reading received with the recommended pressure threshold specific to that vehicle/tire combination. When pressure drops below threshold, the TPMS simply alerts you to find out why.

I don't see where entering temperature into the algorithm would achieve much. Most folks who've gone through driver training already understand that low tire pressure is associated with decreased fuel economy. Yet an over-zealous government thinks we're too stupid to check the air in our own tires, so they mandated that the car manufacturers do it for us - which by the way, raises the sticker price by $500 or so. Feeding the car computer the individual tire temperatures would almost certainly raise the sticker price even more. But to what end? The bottom line is that the nanny states want us to keep the tires aired up for fuel economy - regardless of the temperature.

//greg//

Greg,

I do not want to stir anything up but the Treg does record temperature, pressure, serial number and battery life in the TPMS system. My scan tool can read the TPMS data. I pulled a report off the scan tool and I have attached it.

 

[grohgreg]

the Treg does record temperature, pressure, serial number and battery life in the TPMS system.

No argument. But please consider that I was discussing simple under-pressure versus fuel economy. In my understanding, the temperature data is used relative to a potential blow-out warning. That is, an over-heating tire caused by either under-pressure (sidewall friction) or over-pressurized to the point of overheating in motion.

//greg//