Tire Air Pressure

[sc419795]

Recommended pressure for my vehicle is 35#. The gauge on the car instrument panel reads 31. The manual pressure gauge that I use reads 35. How do you know which is right and which to use? About ready to take an 11 hour drive so want to get the tire pressure up to 35.

[bassnpro1]

Get another gauge and see what it reads. I usually use two on the first tire and if they agree, then only use one on the rest.

[abs988s]

Every vehicle I’ve had, the tpms is lower than tire guage. Both of my current vehicles, the tpms is consistently 3# lower than my analog dial gauge. Assuming your gauge is analog and not digital, trust the gauge over tpms.

[Al from Canada]

I would trust the TPMS.

[CatFan]

Accutire gauges get good marks for accuracy.

[12poundbass]

How old is the vehicle/tire pressure sensors? The reason I ask is on my '08 Avalanche sometimes it'll show I have 7 psi I get out look and it's not flat, check it with a gauge and it's at 35 psi.

[Dave A]

Accutire gauges get good marks for accuracy.

Its a good gauge, been using them for several yrs now.

[joebw]

Every vehicle I’ve had, the tpms is lower than tire guage. Both of my current vehicles, the tpms is consistently 3# lower than my analog dial gauge. Assuming your gauge is analog and not digital, trust the gauge over tpms.

👍

[lakebouef5]

I use an Accu gauge...about 15 bucks. Do not use those cheap stick type gauges.

[dean c]

Two things around here guaranteed with cold weather...TPMS lighting up, and smoke detectors chirping for low batteries.

[omcforever]

Two things around here guaranteed with cold weather...TPMS lighting up, and smoke detectors chirping for low batteries.

[Gsmith223]

I know on my jeep that the TPMS is not a live reading, it takes a few seconds after I start it to adjust. I never trust them

[Basscaster]

I always stop and check my tires about 60 to 90 minutes into my trip by feeling them. I would buy a 4 way lug wrench(walmart-$12) and make sure you know where all the parts are located for your trucks jack. I checked my spare (first time-4 years) and it had a lock on under truck that did not work, I went to go to muffler shop to grind it off( $10 or free). I would buy a $50 floor jack 2.5 ton ($30 sale) and you can use it forever and they are so much EZer than sissor jack and work great for boat too..

[creekchub]

so tire pressure at max or just under?

[TRCM]

Every vehicle I’ve had, the tpms is lower than tire guage. Both of my current vehicles, the tpms is consistently 3# lower than my analog dial gauge. Assuming your gauge is analog and not digital, trust the gauge over tpms.

I would trust the TPMS.

Well, it depends.......did you just fill them ?


I ask because most (read all) TPMS systems need to be driven for awhile to fully reset. Some will appear to reset right away, some take time.

My owners manual says it could take up to 20 min of driving above 15 mph to fully reset the TPMS........it was similar on the chevy I had too.

I typically fill mine with the gauge, and within 30 min of driving, all are warmed up and normally reading the same PSI for all (or at least within 1 psi).

so tire pressure at max or just under?

If the tires are stock, go with what's on the door unless you are towing heavy

[Bassmeister]

Usually when it turns cold I will get the low air light Pump them up to the recommended psi according to my gauge and it goes off . This happens every year about this time. Only needed about 3 psi.

[Walkabout7781]

My (Chevy) TPMS has been telling me the front tires are low for awhile now, since the cold weather started. I don't drive it much, maybe once or twice a week. I pumped up the front tires and they checked fine, and TPMS went away for awhile. I checked the rear tires, and they were low, so pumped them up also, and then rotated the tires (myself, at home, yesterday). I suspect the computer/dash was reading the rear tires and not the front ones. How do I tell "it" that the tires have been rotated, and whether they were X rotated or rotated inline?

I checked my Campbell-Hausfeld stick-type against the tire store and my mechanic friend's (stick-type...he said to pick one of four or more...so he trusts them). Long ago, I paid pretty good $ for a dial gauge that read 6 lbs low. I'll stick with the stick!

[RazorCat]

Get a new tire gauge. I got an Accutire MS4021 and MS4400. Both measure pressure Within a pound of my TPMS readings.
Cheap, amd top rated by CR.

[TRCM]

My (Chevy) TPMS has been telling me the front tires are low for awhile now, since the cold weather started. I don't drive it much, maybe once or twice a week. I pumped up the front tires and they checked fine, and TPMS went away for awhile. I checked the rear tires, and they were low, so pumped them up also, and then rotated the tires (myself, at home, yesterday). I suspect the computer/dash was reading the rear tires and not the front ones. How do I tell "it" that the tires have been rotated, and whether they were X rotated or rotated inline?

I checked my Campbell-Hausfeld stick-type against the tire store and my mechanic friend's (stick-type...he said to pick one of four or more...so he trusts them). Long ago, I paid pretty good $ for a dial gauge that read 6 lbs low. I'll stick with the stick!

Look in your owners manual...there is a procedure you do to reset them....involves letting air out of all 4 tires then filling them back up in a certain sequence. Only takes a few psi to do it.