yesterday I lowered my TP to 35 lbs. 2012 JKU sahara with 18" on it from the factory. Today my TPMS light came on. I did not lower the pressure in the spare. it is still at 44 lbs where the dealer had it on all 5 tires. Think that would throw a message?

 

When I changed the tpms limit using my superchips the stock setting was set to 35 psi. So if one tire dropped below 35 it would set the light off. Its not an issue though. I run my stock rubi tires at around 30-32. Just keep an eye on it from time to time so you know where the pressure is at and you will be good.

 

the sensor light will go off once your tires are at 37psi

 

If you run your tires at the bare minimum pressure, what oftentimes happens is that when the ambient temperature drops, so does your PSI, so you get the warning.
Put a couple more PSI in there and you should be GTG, unless you have a leak.

 

Iam thinking that the gauge I used was off 4-5 lbs. Checked it with another and it read 32 lbs. i aired them up to 35 and still had the icon light. Maybe I'll push them up to 37 as stated in previous post. Thanks.

 

It's very common for consumer tire pressure gauges to be what I would consider "way off".
The only way to be sure is to get a good one, and have it periodically calibrated.

If your door placard says the tire pressure should be 37 psi, the light will come on when the pressure drops to 29 psi, and will go out when it rises above 34 psi.

34 psi on the placard would be: warning on at 27 psi.; off above 31 psi.

This is for the 2008 model year. I don't know if later years are different.

 

What's the most typical tire pressure for stock Rubicon tires? With the recommended 37PSI the tires are extremely noisy on the highway and it rides like a rock.

 

I keep mine at the placard pressure of 37 psi. I find it is good for tire longevity. When new the tread was 19/32" deep. 43,000 miles later they are 11/32" deep, and even across the tread.

I don't find the noise or ride objectionable. Even if I did, I would favor the psi for fuel economy and tire life.

 

I've kept mine at 37PSI for the same reasons. The wear has been very good so far.

Since the last time the dealer rotated my tires they seem very noisy. Much more so than at any other time they were rotated. I'll check the pressure again with a different gauge and see if maybe they're overinflated. That could be the cause of the noise and harsh ride.

Thanks.

 

I rotate at 6,000 miles.
Extra noise for a few hundred miles after rotation is what I've noticed, too; even with no pressure change.
More frequent rotations may reduce the noise, but laziness dictates semiannual rotations.
Each tire wears a little differently according to its position. When moved to a different position, the tread hits the road at what I think of as "against the grain", until it works into its new environment.