TPMS Monitors

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Dfr360cuda

Diagnosis... Plum Crazy.
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So...
My TPMS idiot light came on.
I can't get it to go off.
I know what PMS stands for, but what does the T mean ?
 
Tire pressure monitoring system. Incorrect air pressure. Button for reset may be in the glove box (that’s where it is in my Jetta).
 
So...
My TPMS idiot light came on.
I can't get it to go off.
I know what PMS stands for, but what does the T mean ?
Is the lamp a tire cross section "horseshoe" on steady, or flashing, or is it showing the letters TPMS? What vehicle is this?
 
Tire pressure monitoring system. Incorrect air pressure. Button for reset may be in the glove box (that’s where it is in my Jetta).

The PMS thing was an attempt at humor.
What I have learned about these things.....
The rebuild kit is a waste of money, the last one never worked.
It's illegal to remove them, but since I took the tire out of the back of my truck, "the tire store guy had no way of knowing what car it came off of". They became mandatory in 2008.
Breaking the bead with a floor Jack and a ratchet strap is a lot harder than you tube. Could be my low profile tires.
The other 3 will be in the trash soon.
 
If the pressure is to high it will set off the light also
 
Not necessarily.


Let me rephrase that, The TPMS monitor the tire pressure and if the pressure on the door says 36psi that is what the sensors are programed for, If the pressure veries up or down to much it will turn on the light. GM's are pretty tight tolerance IIRC
4-6 psi in ether direction will turn on the light.
 
What kind of car? My 05 Impala, with key in accessory position, I have to push in on the tuning button for 5 seconds, and go from there. Scroll through rest of BS until I get to the TPMS and clear it. I wish it was as easy as just pushing a button...
 
The PMS thing was an attempt at humor.
What I have learned about these things.....
The rebuild kit is a waste of money, the last one never worked.
It's illegal to remove them, but since I took the tire out of the back of my truck, "the tire store guy had no way of knowing what car it came off of". They became mandatory in 2008.
Breaking the bead with a floor Jack and a ratchet strap is a lot harder than you tube. Could be my low profile tires.
The other 3 will be in the trash soon.
Rebuild kit???? There are sensors that are available w/o the stem portion if they are separable, but this shouldn't affect their function at all unless it's a "fits-all" replacement.
I only use OE stuff, & if it has to go to another dealer for programming so be it.
It's not illegal to My knowledge to remove one, but many businesses and national chains will refuse to do so for fear of being sued 'cause the clueless owner/operator just
couldn't find the time to do a walk-around or stop in and check the air in the tires, all of a sudden it's YOUR fault if something goes wrong so................
 
The guy I work with put all the sensors in the spare tire.
That's really smart. The TPMS is a valid safety system that will alert you to a potentially hazardous tire situation. That's about as smart as bypassing the seatbelt buzzer in case one doesn't want to wear no stinking seat belt. My TPMS has correctly warned me of low tire pressures on several occasions. I'll keep mine hooked up.
 
Yeah me too,.Tires are too pricey theses days, and with an AWD, they always want to sell you four when one goes down.
The cars I have had were auto resets.
The thing is sometimes my wife doesn't tell me her lite is on, until 3 days later......
and now the car drives funny.......
and you guessed it;there goes $250
You know marriage sometimes ain't all it's cracked up to be.......
That's almost an entire weeks wages for this semi-retired hombre.
 
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That's really smart. The TPMS is a valid safety system that will alert you to a potentially hazardous tire situation. That's about as smart as bypassing the seatbelt buzzer in case one doesn't want to wear no stinking seat belt. My TPMS has correctly warned me of low tire pressures on several occasions. I'll keep mine hooked up.
Well, that's really smart unless You need the spare, and You're 60 miles from civilization...........then You're going to have 4 (or 5 if there is one mounted in the spare)
ruined sensors.......and the lining in the spare casing is gonna take a beating. I agree, they're there to help You catch a tire going down even before it's noticeable, so
You can check/have it checked for a nail or damage etc. AJ makes My point tho', I've seen it at the dealership a piss-load of times, people ignore the warning lamp just
as people fail to walk-around or stop and check their tire pressures. The difference for the shop becomes liability.................
Usually, it's damage or the batteries that cause the failure of these, some "bargain OE's" found online are "old"....so the batteries have been around a bit, don't expect a
long service life. If You live rural, and the roads are rough/unpaved for stretches, it is tough on them & can cause them to give it up prematurely.
I still don't know what vehicle We're talking about here.....................................
 
What vehicle is this on? Other than a few posts I see a lot of mis guided information on here. If the light is staying on and all tire pressures are remaining the same and assuming you have no leak then one of things need to happen.

1. The system needs to be relearned per the manufacturers process wether it be by using a tpms tool or by a specific drive cycle.

2. A sensor has a low or faulty battery causing the light to illuminate.

Best bet is to take it to someone who has the tool and can read each individual sensor, they can tell if the battery is good or not and which ones are responding to the tool.

If the tool reads all the sensors and all the battery levels are good then it is a issue with the tpms monitor computer
 
Let me rephrase that, The TPMS monitor the tire pressure and if the pressure on the door says 36psi that is what the sensors are programed for, If the pressure veries up or down to much it will turn on the light. GM's are pretty tight tolerance IIRC
4-6 psi in ether direction will turn on the light.

I think the industry standard is 10% of the reccomended pressure in the door jamb. So for 35 psi reccomended it will come on at or around 31.5 psi.

Other manufacturers may differ slightly from 10% value.

I dont think ive ever seen a tpms light come on for a gain in pressure, that wouldnt make much sense, the psi rating in the door jamb is supposed to be a cold pressure setting, meaning that the vehicle has been parked and not in direct sunlight for at least 4 hours. Pressure will go up a average of one psi per 10 degrees of temperature increase, so youd start out a 35 psi but at operating temperature the pressure may be as high as 40 psi, but yet the light shouldnt come on. There may be a few high end vehicles that expirience this maybe as to warn the driver the tires have gotten too warm as the pressure has increased, but most of your average trucks, cars and minivans wont expirience this
 
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How can you disagree with this? Do you know the man and he told you he lied to me? LMAO I never said I agree with this.


Sorry i should of just replied lol, i meant disagree as in i disagree about him doing that lol i was in lazy sunday mode, it was a lot easier to hit disagree instead of a reply, but low and behold i ended up replying to it anyway lol
 
I think the comment about one tire being at a higher pressure just means the module will be reading 3 low pressure ones..or at least one of the lower ones should trigger it.
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I was under the impression that the module compared the highest to the lowest and triggered the light when the difference exceeded a preset thresh-hold of difference, not a fixed number.
As an example say you loaded the back of your CUV up with several hundred pounds of camping gear, and it's a long trip, so you might be thinking 44psi, the max on the tire sidewall, might be a proper pressure. But you leave the front at 32, the same pressure you have always run, cuz the that's what it takes to keep the treads wearing properly. But now you have a disparity of 12 psi. This should trigger the warning.
But if I was the programmer, I would tell the module to ignore this after say three key on/off cycles, and to resume looking for a one-tire pressure loss. I mean, that would be logical right?
But honestly I have no clue how these devices are programmed. I just wish my wife would inform me of when an unfamiliar light shows up.
 
They should read individual pressure not the differences to trigger the light, for example, a new f350 i believe reccomends 65 -70 psi in front and 80 psi in rear, if they went off the difference the light would constantly be on. The threshold for the tire light should be about 10% or anything below 60 psi weather it be front or rear. That being said usually you have to run at least the lowest reccomended tire pressure for the light to stay off, so if front is 65-70 and rear is 80 you should be able to set tires all the way around for 65-70 psi. there is no set forward or rearward position for a sensor, it can be moved to any place on the car. It definately sucks on the heavier trucks especially since the factory reccomended was intended for a load (what the truck is made to do) but running that high of a pressure empty ruins the tires and wears the center. The ideal pressure for a 3/4 or 1 ton truck with no load, with 10 ply 80 psi max tires is somewhere between 60-65 psi but on the newer trucks with tpms sensors the pressure you need to maintain proper tread wear is below the threshold of the range on the sensor thus the light stays on all the time. This is based off my experience at work. Ive seen cars come in with the light on and they are all low, and ive had them come in with a low individual tire and the rest someone has maxed out. I guess this is a good example, ive had cars come in where people have been running 44 all the way around, they tell me the light has just come on and ill check the tires and find one that is at 30 or less.
 
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Ok I see
But you gotta wonder why they didn't give the owner/operator some discretion in selecting the set points; I mean how hard would that Be? GM already has the DIC display, where you can change a bunch of personal preferences. Ima thinking it would be easy. But for some reason, they don't want to let us choose. Just another case of them versus us.
 
I know its frustrating, especially what sucks is these guys with 3/4 or 1 ton trucks and want to put aftermarket wheels and larger tires on, ive seen some 10 ply tires in certain sizes usually 20” rim and above max at 65 psi so how do you get your light to turn off then? Lol most in that situation only need maybe 45-50 psi to keep proper treadware and being lower than what factory sets the light stays on all the time, not to mention the watning indicator. Wish they would allow thrm to be adjusted but then again the manufacurer doesnt reccomend you change anything about a factory vehicle
 
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