TPMS light if pressure too HIGH?

[4boer]

Light went off a while ago as pressure had dropped with the temps. I refilled, and put a lot in the spare as it's a PITA to get down and I figure pressure will be dropping again when it get real cold. I probably went 40 or so. I've driven a bit and light is still solid. Also had to mess with, but didn't replace, one of the valve cores as it is loose. That tire is holding air fine now.

I think I have read every post about the TPMS I could find, but nowhere does anybody mention if too high a pressure will make it go off. Before I lay on the cold garage floor I thought I would ask those in the know.

 

[CJ3Flyr]

Light went off a while ago as pressure had dropped with the temps. I refilled, and put a lot in the spare as it's a PITA to get down and I figure pressure will be dropping again when it get real cold. I probably went 40 or so. I've driven a bit and light is still solid. Also had to mess with, but didn't replace, one of the valve cores as it is loose. That tire is holding air fine now.

I think I have read every post about the TPMS I could find, but nowhere does anybody mention if too high a pressure will make it go off. Before I lay on the cold garage floor I thought I would ask those in the know.

What year? To answer your question: I don't think over inflation is the issue. Several members run Revos at 38-40psi cold and have never mentioned it. Some with D or E rated tires have run pressures in the mid-high 40's and not mentioned it either.

:cheers:

 

[jharris2]

Light went off a while ago as pressure had dropped with the temps. I refilled, and put a lot in the spare as it's a PITA to get down and I figure pressure will be dropping again when it get real cold. I probably went 40 or so. I've driven a bit and light is still solid. Also had to mess with, but didn't replace, one of the valve cores as it is loose. That tire is holding air fine now.

I think I have read every post about the TPMS I could find, but nowhere does anybody mention if too high a pressure will make it go off. Before I lay on the cold garage floor I thought I would ask those in the know.

Did you inflate the spare so it's higher than the rest of the tires? I think TPMS also tries to ensure that the tires are all equally inflated.

 

[4boer]

Re: Re: TPMS light if pressure too HIGH?

[

What year?

2004

 

[HB 4X4]

Re: Re: TPMS light if pressure too HIGH?

Did you inflate the spare so it's higher than the rest of the tires? I think TPMS also tries to ensure that the tires are all equally inflated.

I keep my spare higher than the rest, so that I can limit the frequency of it setting off the sensor. I've never had an issue with keeping it higher than the rest.

You mentioned that you adjusted the valve core? Did you possibly damage anything?

 

[Kmvreter]

Re: Re: TPMS light if pressure too HIGH?

Did you inflate the spare so it's higher than the rest of the tires? I think TPMS also tries to ensure that the tires are all equally inflated.

The TPMS trigger for a steady light is a minimum pressure only, around 28 or 29 psi IIRC. The system is not checking for equalization. I keep my spare close to 50 psi without a light on.

4boer,
The light should go out within 1 or 2 minutes of refilling (mine works faster.) You can test this by purposely deflating and reinflating a known good tire once you get past this issue.

What pressure are you running in your tires? Check the road tires first again? Could your spare be leaking faster than you think?

 

[4boer]

Well, I called two dealerships and the people who make the scanners. They all said that the light will be on if the pressure is too high. So, it's under the rear-end I go! Hope I don't get too dirty! Ya, I'm still talking about tires.

 

[Kmvreter]

Well, I called two dealerships and the people who make the scanners. They all said that the light will be on if the pressure is too high. So, it's under the rear-end I go! Hope I don't get too dirty! Ya, I'm still talking about tires.

Yeah, watch that rear end!

Nowhere in the service manual or literature does it say anything about psi too high. The sensors have a working range up to ~92 psi. If they fail above this then they set an error DTC and the light blinks (instead of steady.)

I've attached the new feature sheet from '04. It shows that if the light comes on due to a trigger below ~26.8 psi that you need to inflate to over ~31.9 psi to reset the sensor to turn the light off.

Let us know what you find.

 

[4boer]

Suprise, suprise, suprise! I lower the spare expecting the PSI to read 40+. It's flat! So that is twice in the last two months I have put air in a tire and it goes flat over night due to a valve issue. Two different tires/makes (spare is the original. Zero miles on it.) The only constant is TPMS valves. Never had it happen even once b4 in decades of driving. Not happy. The valve did not have a cap on it if that matters. It does now. Of course if I take it in someplace I'm sure they will tell me it's not fixable and hand over a couple of hundred bux for new sensors. The first tire I had a problem with is still holding air. I have a metal cap on it now. Greased the valve threads as recommended by others. Dash light is off. I'll be watching it. I guess this is called progress.

 

[Kmvreter]

... The only constant is TPMS valves. Never had it happen even once b4 in decades of driving. Not happy. The valve did not have a cap on it if that matters. It does now... The first tire I had a problem with is still holding air...

The other constant is valve cores. There is nothing wrong with your TPMS's. They are working the way they should. I suspect you had the same issue with the spare as many have had after filling any valve, regardless of the tire. The valve core doesn't close completely after filling and you have a slow leak. It happens. Operator error!

 

[tipotex]

Are these standard valve cores? I have one that audibly leaks anytime I check the pressure, but I'm able to stop the leak by nudging the core until it re-seats. In the long run I'd like to replace it. This is on an '05.

(Don't mean to hijack, just a quick question...)

Thanks.

 

[CJ3Flyr]

Are these standard valve cores? I have one that audibly leaks anytime I check the pressure, but I'm able to stop the leak by nudging the core until it re-seats. In the long run I'd like to replace it. This is on an '05.

(Don't mean to hijack, just a quick question...)

Thanks.

My '07 cores are standard cores


:cheers:

 

[Kmvreter]

Industry standard cores.

 

[4boer]

[ I have one that audibly leaks anytime I check the pressure, but I'm able to stop the leak by nudging the core until it re-seats. In the long run I'd like to replace it. This is on an '05.

(Don't mean to hijack, just a quick question...)

Thanks. [/B]

Yes, I'm guessing I've got two loose cores, though I sure can't hear any air leaking. In the future when I add air I finish with a couple drops of water and look for bubbles. It's an 04 and I guess the valves and cores are original.