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Old 10-08-2010, 07:44 PM   #1
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Odd Problems this morning

ok so my 2010 Sahara Unlimited tire pressure indicator light came on yesterday afternoon so I check pressure and all tires were at 35 or 35.5. I filled them all up to 40 at 6:15pm last night and though the light turned off after putting air in tires, I stopped in the wawa for a coffee and when I started it back up, the light came back on again and said low tire pressure.
I ignored it until this morning then decided to check pressure again and all tires were back to 35 and 35.5. I know it got down into the lower 50's last night but how the hell do you lose 5 pounds of pressure in all 4 tires in 13 hours overnight?

Then I went to lock it with remote and it didn't work. So i dropped it off this morning and remote still did not work at all.
After having it damn near all day they sais all they did was put air in the tires (Really? I Did this last night) and remote was working fine.

WTF? How could tire pressure light and remote go out at almost same time and then all of a sudden be ok again?

Does this sounds like any kind of electrical issue I should watch?

Thanks!

Patrick

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Old 10-08-2010, 08:49 PM   #2
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A 5 lb delta between hot tires and cold tires is not unusual, regardless of ambient temp. Your morning measurement might have been different after the tires came to temp.
As for the remote, I have had elusive electrical gremlins in the few weeks that I've had my 2010 JKU. No remote start, remote start but no accessories, no door locks, no horn on door locks. So I went through the remote programming instructions in the Owner's Guide and they have since gone away.

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Old 10-08-2010, 08:51 PM   #3
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What about your spare? Did you check that?
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Old 10-09-2010, 06:29 AM   #4
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Thanks el mono, never thought about the tires being hot when I filled them and cold in the morning when I measured again. Hopefully that was it and this doesn't keep happening.
If the remote goes again I'll reprogram again and hope that does it.

daggo...What about the spare? The spare isn't being monitored is it? And no I didn't check the spare.
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Old 10-09-2010, 07:16 AM   #5
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daggo...What about the spare? The spare isn't being monitored is it? And no I didn't check the spare.
Yes.. all tires are monitored (including your spare).. that's so, if you ever needed to use your spare, it would be ready to go with the correct amount of pressure.

Personally, I think the TPMS is a bunch of crap (way more trouble than it's worth). My wife's Liberty had just one tire pressure sensors go bad (each tire has a built-in transmitter that's part of the valve stem), so I was getting an error on my display. Bottom line, they wouldn't let it pass state inspection until I had it fixed. $135 to replace the valve transmitter in that one tire.

How the heck did we ever survive all the years before we had all these wonderful gadgets!
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Old 10-09-2010, 07:19 AM   #6
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Thanks Hiker!!!

Now I feel like a complete moron because that was probably the issue!!!!
I was wondering why they messed with my Rangers tire cover!!! UGHHHHHH!!!!!
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Old 10-09-2010, 09:02 AM   #7
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Are your tires running nitrous or air in them? I know that my old stock tires which had nitrous would change pressure on a daily basis because of the temperature. Funny because that is one of the things they tell you at the stealership that nitrous doesn't do so it's better for your tires. I'm running pure good old fashioned air in all of my tires now and just check them every month or so.
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Old 10-09-2010, 09:27 AM   #8
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Yes.. all tires are monitored (including your spare).. that's so, if you ever needed to use your spare, it would be ready to go with the correct amount of pressure.
That's not what my 2010 Owners Manual says. Full size spare tires have the TPM sensor but it isn't monitored until mounted as a rolling wheel.

From the manual:
"A low spare tire will not cause the "Tire Pressure Monitoring Telltale Light" to illuminate or the chime to sound."

"The "Tire Pressure Monitoring Telltale Light" will illuminate in the instrument cluster, and an audible chime will be activated when one or more of the four active road tire pressures are low."

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Old 10-11-2010, 05:04 PM   #9
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Well the damn remote didn't work again today when I left work. Had to get in manually, start it with alarm going off then get out and it locked and unlocked again.
Called dealer and they said this shouldn't keep happening, yeah, no $hit!!
WTF???
This better not be some electrical issue starting up with my 2 month old 2010!!!
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Old 10-11-2010, 05:18 PM   #10
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My AEV ProCal Module reset all my tires at "0" and no more TPMS/Chime/light-"OH"

I don't have any xmitters in my wheels either !!

Kinda convenient !!

JIMBO

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