TPMS how many psi does it have to drop?
Driver School Candidate
Joined: Nov 2013
Posts: 44
Likes: 0
From: HI
So on the 3rd Generation RX there is no longer a sensor in the spare. That makes it worse.
I only checked the tire pressure in my old spare when the TPMS light came on. Now you will need to remember to check it at regular intervals. Or when you do get a flat you may have a flat spare tire as well.
armadillo
" I am awaiting delivery of my first Lexus RX 450h and am not familiar with the TPSM. Is there any way to check tire pressure? Or will the pressure only ever be shown when the warning comes up? "
You have never used a tire pressure gauge?
I only checked the tire pressure in my old spare when the TPMS light came on. Now you will need to remember to check it at regular intervals. Or when you do get a flat you may have a flat spare tire as well.
armadillo
" I am awaiting delivery of my first Lexus RX 450h and am not familiar with the TPSM. Is there any way to check tire pressure? Or will the pressure only ever be shown when the warning comes up? "
You have never used a tire pressure gauge?
No, I don't play soccer!
Joined: Jul 2009
Posts: 6,652
Likes: 177
From: NJ
armadillo, the picture I posted is a screen I brought up by using the toggle switch on the steering wheel. Normally only the tire pressure displays. So yes, you can see it at any time. The TPMS or low pressure light is separate.
One thing I meant to add, the display can take up to two minutes to read the tire pressure initially. Even more reason to leave the power on after doing a TPMS reset for a few minutes per the instructions.
One thing I meant to add, the display can take up to two minutes to read the tire pressure initially. Even more reason to leave the power on after doing a TPMS reset for a few minutes per the instructions.
Driver School Candidate
Joined: Nov 2013
Posts: 44
Likes: 0
From: HI
So then I don't understand what the fuss is. Obviously, it would be easy enough to check tire pressure (make it habit during each refuel) and you won't be surprised. In case of unexpected deflating, the warning comes up. My tire pressure gauge won't get much use in the future I presume.
No, I don't play soccer!
Joined: Jul 2009
Posts: 6,652
Likes: 177
From: NJ
So then I don't understand what the fuss is. Obviously, it would be easy enough to check tire pressure (make it habit during each refuel) and you won't be surprised. In case of unexpected deflating, the warning comes up. My tire pressure gauge won't get much use in the future I presume.
Lexus Champion
Joined: Feb 2004
Posts: 1,973
Likes: 55
From: Ohio
I completely agree that TPMS is a joke. If I had an option not to pay $300-$500 (est) premium it tacks on to the cost of the vehicle, I certainly would not. In fact, my RX spends the winter season w/o TMPS as it is rolling on winter tires. Now, that's a real safety item.
We all forget why TMPS was mandated in the first place. It has to do with Ford Explorers rolling over and killing people when running recommended 24PSI tire pressure on Firestone tires. The government fixed the problem. Drives no longer need to be aware of simple maintenance items their vehicle requires. Luckily for us, oil change reminders only trigger a simple warning on the dash based on the mileage since the last reset.
We all forget why TMPS was mandated in the first place. It has to do with Ford Explorers rolling over and killing people when running recommended 24PSI tire pressure on Firestone tires. The government fixed the problem. Drives no longer need to be aware of simple maintenance items their vehicle requires. Luckily for us, oil change reminders only trigger a simple warning on the dash based on the mileage since the last reset.
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Jeffrimerm
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