CHECK YOUR TIRE PRESSURE!

Cool. This thread has been bumped along for 10 years! I have TPMS sensors on both sets of tires, summer and winter. I rotate them myself, 33” heavy buggers on 17” truck rims. After changing, the TPMS recognizes the tires sitting in the corner of the garage. I have to drive out of range then set the sequence and air down the tires to get the system to recognize the new set. Usually I do it in front of the Cal Tire, then fill up the tires with their pump.

By the way, there are still a lot of guys who were here ten years ago. Get a life! 😀
So strange how those sensors work. At the start of the pandemic, Discount Tire had customers wait in their cars in the tire bays. My sensors on the 2015 Genesis would go out when they dismounted the old tires from the rim, and reappear when they put the new tires on, away from the car! Here’s a pic I took where you can see it pick up my tire while it’s on the spin balancer
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Had sensors installed in the Jeep last week. Had to put a Witech pod on it to "wake up" the system, I assume because it had already moved into winter mode where it ignores them. I also had a nail removed and a plug changed out for a patch-plug. Two of the tires were quite low when I pulled them from the garage at 15 and 20psi respectively. I put them up to 40, which will be ~37psi (what they are supposed to be at) when the temp drops.
 
I set up the TPMS system on the snow tires for my 3/4 ton. They’re LT load range E tires, 50 psi up front, 60 psi rears. Since I don’t tow in the winter, I’m happy to drop that to 55 psi. I used Chevy’s manual sequence where you press both the lock and unlock buttons on the FOB, then air down each tire for 30 seconds until the horn honks. The last tire is the driver’s side rear, and the horn will sound twice when done. I then air up the tires back to the proper amount.
 
Replaced one of my TPMS sensors on my 2011 Frontier with 173K because the external stem threads were buggered up because of something that was installed on the stem and because I just wanted to see if I could do it. I am pretty sure it has the original sensors and all are working ok. I uncovered the battery terminals on the removed sensor circuit board to measure the voltage. The battery read right at 3.0 volts while most new 3 volt batteries read around 3.3 volts. Makes me wonder how long the other sensors would last.
 
No, I check before, and during trips, and at all temp swings.
+1
I also carry a portable air compressor on trips.
It came in handy on the last trip when I came across a female who'd just finished putting her temp tire on her late 90's Neon.
Given the cars condition and age I knew it was probably flat. Sure enough, after checking with my pressure gauge there was a mere 5ish psi (60 is the recommended).
Got it up to 60psi and by the time the car was off the jack it looked "right".
 
I pull up the digital display a couple of times a week and look at the individual pressures . I've verified it against a gauge it's right on .
 
OK- I'll bump the almost 11 year old thread :) .

I check the home fleet often, normally early on a Sunday before sun hits anything and they sat all night. I normally go about 2 psi over the door sticker but I also use my tread depth gauge often to check the wear across the whole width of tire. Helps to let me know if inflation and or alignment issues. My Sonata always needed 2psi more in front than rear to keep wear even. The spares get checked every couple months and I normally fill them about 5 psi high to account for time and temperature loss.

Now in the TPMS world and different types of systems. Who uses and recommends what pressure gauges? I have 2 Slime Sport digital ones in 2 cars that I had forever and kept everything good. I have 3 others that look just like it, forgot the name, in the other vehicles. They all have an old school stick version in bottom of glove box also in case I need or have also given to others. Something is hopefully better than nothing with kids friends and others. I never really compared the 5 digital ones to each other, just used them in those cars (and helping other people).

My '19 Pilot and Father-in-laws '16 Renegade have the readout on dash that I check often before driving, they show PSI right away. Easy to see that they are all good. My son's girlfriend has a '21 Tucson, that needs to "wake up" for almost a mile before giving readout. '08 CRV and '10 Forte have sensors but no dash readouts. '17 Accord has indirect through ABS, no sensors.

This past weekend I used my Accord Slime digital and checked all the fleet. Tucson was all out of whack. I set to 36psi knowing she was going back to school the next day. She asked later if I fixed them for her because her friend inflated one that popped the TPMS on one colder morning. She asked why I filled them all to 39psi? Huh??? Now I go to Pilot and Renegade early cool cloudy day to check them as well as Tucson. I use the Slime from Accord and Pilot. Both read the same on all 12 wheels but 1.5-2psi lower than Pilot and Renegade TPMS show ( both Slime 33.5, Pilot 35, Renegade 35 both Slime, 37 TPMS). I check Tucson at 36 on Slimes, dash says drive to display :mad:. OK almost 1 mile down the road before it displays 39 on all 4. QuickCheck is at the end of that mile with free air that you set to and beeps when at whatever PSI (I did 36). I had to bleed air out lower and refill. QC beeped at 36, both Slimes read 34. TPMS showed 36 on drive back and then one popped to 37.

I just bought a Jaco digital and a cheaper Astro Ai. I checked the Pilot this morning. TPMS 35. Both Slimes 34.5. Jaco 34.4, Astro Ai 33.7. The Jaco says Calibrated to +- .5% full scale.

I'd rather be 1-2psi physically over in the tire then under also to account for lack of possible checking. I walk around all of them also frequently. The Astro Ai was harder to get a good seal than the others.

Fortunately I haven't experienced it yet. Would the Tucson show sooner if one was flat or very low? I don't know on Accord either it only popped on 2 times. Once with a nail while driving and was down I think about 8psi. Once when dealer OVER inflated and all 4 were about 8psi high from last "TPMS calibration", let some air out and TPMS went off.

My Son's Forte popped on right away when temperature dropped 60-70 degrees in a week.
 
Same here. Overnight temp drop from mid 50's to high 40's. SF Bay Area.

My friends in Phoenix report the identical issue, with overnight lows going from the 60's to the same high 40's recently. All Fahrenheit.
 
I use one of these, attached to my compressor, and pretty much check/set every day or two. I strive to never drive on anything but the exact recommended psi. OCD, I know, but I have vehicles who's NVH seems to be quite sensitive to even the slightest pressure deviation.
 
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