Tire Pressure problem?

[Wydz]

Went to work today, no light on.

Was leaving work, light was on for my RF, and said it was at 23.

Drove like 15 mins, parked my car and came back 90 minutes later, read out RF 20

drove 30 mins home, reads out RF 18 now

My tire doesnt look low AT ALL though is my only concern, doesn't look low, and doesn't feel low, no air coming out that I can hear, and didnt drive differently at all.

Do I have a bad sensor or should I just reair my tires? Hasn't been done in a while.

 

[The Champ]

A radial tire can be low on air without showing visible signs that the tire pressure is off.

You very well might have a nail or screw lodged in the tread creating a slow leak. You won't "hear" a slow leak.

A simple tire guage will confirm the sensor's reading. Everyone should invest in their own gauges and keep one in every vehicle they own. One can be purchased for as little as $2.00. I personally have 5 digital gauges - one for each of my 5 cars. IIRC - they were about $12.00 each.

I don't trust the gauges that have been abused at the local filling station - or the automatic gauges on some of the automatic pumps.

 

[TurtleOverlord]

If you're not in a rush you can get them pretty cheap from china $3
https://www.ebay.com/itm/Digital-Ti...=item3d01d8008b:g:0vYAAOSwGzhaO4yI:rk:32:pf:0

Its the same one I've seen in stores, just without a brand logo

Just dont drop it, its not very durable.

 

[JTee2017]

At the very least, go to Autozone or any parts store and get a tire pressure gauge. You can find them at Home Depot and other places as well for a $ or two.
Even if the gauge is not totally accurate, you can compare the readings you get with the suspect tire and the other 3 tires pressure. That would tell you if you have a slow leak which I'm guessing is the case.
We had a slwo leak a few weeks back and it turned out there were not one, but both a nail and screw in one tire. The nail was worn down and not visible at all and the screw was pretty obvious, but it was discovered later.
Must have driven through some demolition debris form someone with a trailer loaded with it and it dropped bombs all over the road in places.

 

[LMurphy]

Also make sure you're looking at the right tire haha I took my car to get the oil done and tires rotated and they didnt reset the sensors. Is it your RR? Believe me, I am guilty of this happening to me.

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