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  #1  
Old 11-29-2012, 01:25 PM
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Hello

Good afternoon I am a new member (just registered) who was referred to this site by one of my colleagues. I have taken my new Jeep (2012 Grand Jeep Cherokee Overland Summit) to the dealer because of the tire pressure on more than 3 occassions to date. Is that normal?
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  #2  
Old 11-30-2012, 02:38 AM
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Re: Hello

Is the tire actually losing pressure or is it just the TPMS.
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Old 11-30-2012, 02:47 AM
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Re: Hello

Tpms acts differently when at elevations higher than sea level. I live at 7,500 ft. And my tpms is always off, (lower) by almost 3 pounds than what the tire is actually inflated to.
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Old 11-30-2012, 08:06 AM
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Re: Hello

What do you typically use for PSI? Folks at high altitudes sometimes have to run 1-2 psi above recommended gauge (37 to 38 in this case) to keep from false TPMS readings. I don't think any manufacture does this, but they should use a fifth sensor to measure ambient pressure so the TPMS reading can be adjusted to gauge pressure.
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Old 11-30-2012, 09:50 PM
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Re: Hello

I check it in the morning before driving, and stick with 33psi. The manufactured suggested psi. I refill in the winter months more often than summer. In the coldest of winter, -10 to 25 deg., i have to drive for several hours before it resets the tpm, but not worried about it because i know the actual meter reading is correct vs the tpm. In the summer it has no problems at all.
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Old 11-30-2012, 09:53 PM
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Re: Hello

Welcome to the site. .
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Old 12-01-2012, 12:06 AM
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Re: Hello

So 33 psi is whats recommended on the door sticker for your model? Mine recommends 36 psi. And the warning goes off when the TPMS reaches 30 psi, which is 32 or 33 psi gauge at your altitude.
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Old 12-01-2012, 12:33 PM
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Re: Hello

33 for 18". 36 for 20" at 60 degrees F. If you live in the north, the pressure will vary during the day by up to 4 -5 lbs as the air warms up. Also driving will warm up the tires.
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Old 12-02-2012, 07:53 AM
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Re: Hello

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Old 12-02-2012, 03:30 PM
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Re: Hello

I forgot to mention that i have several jeeps. A 2006 liberty with 18' tires, and a overland summit with 18's
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