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Unread 06-30-2012, 11:34 PM   #1
millav
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Low tire pressure sensor going off

Hey

I have a 2011 wrangler and the low tires pressure light has been going off since month 1. My dealership garage says they've replaced all of the sensors, but it still goes off...anyone else have this issue?

Thanks!

Milla

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Unread 07-01-2012, 12:29 AM   #2
1222
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to the forum.

What psi are putting in your tires and are you doing the same to the spare tie?
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Unread 07-02-2012, 04:25 PM   #3
cphilip
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Another government mandate for your safety.... sigh...
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Unread 07-02-2012, 06:50 PM   #4
jeepjerryp7m8
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Welcome!
Buy a YJ or TJ and never worry about this again.
Seriously though, try rotating your tires front to rear. The pressure sensor really reads RPM, not pressure, if the problem goes away tell the dealer what you did. That will help them track it down.
Jerry
BTW; Are your tires the same size?
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Unread 07-02-2012, 09:57 PM   #5
squarelight94
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Quote:
Originally Posted by jeepjerryp7m8
Welcome!
Buy a YJ or TJ and never worry about this again.
pressure sensor really reads RPM, not pressure,
Really?! How does it work like that? (I don't know too much about the tpms' but I really thought it sensed pressure


OP just wait till you air down and have the sensor beeping at you the whole time on a trail! Haha thats how my buddy found out about this problem.... It was hilarious
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Unread 07-02-2012, 11:37 PM   #6
SRT8LAREDO420
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My 07 Laredo and my 08 srt8 both have restarted tpms sensors ever since I bought the jeeps they have had issues. I just recently decided to switch all tpms sensor to the new style sensor made by vdo. (aluminum valve stems) when I replaced them all I had to do was disconnect the iod fuze located under the hood #27 reconnected after 10 min and the wcm will clear any past codes. Have psi at 36 havnt had a problem with my system for 300 miles. Keep in mind jeep do not have a set procedure for resetting the tpms sensors besides just driving the car for 10 min above 20 mph. The premium tpms systems require a magnet to wake the sensors up. Hope this helps.
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Unread 07-03-2012, 05:21 AM   #7
Ruffles
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If you haven't done so already, check the pressure on the spare.
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Unread 07-03-2012, 08:50 AM   #8
TempVAJeep
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Quote:
Originally Posted by squarelight94 View Post
Really?! How does it work like that? (I don't know too much about the tpms' but I really thought it sensed pressure


OP just wait till you air down and have the sensor beeping at you the whole time on a trail! Haha thats how my buddy found out about this problem.... It was hilarious
Can't see how the RPM's come into play, Ones on my Subaru will come on the first cold spell of the fall because the temperature has reduced the pressure in the tires...

LOL, My coworker just told me about his brother doing the same thing, aired down for beach riding & couldn't figure out the alarm going off... thanks US Gov't!
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Unread 07-03-2012, 09:29 AM   #9
Burlbook48
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Another frigging computer tool to replace common sense. (sigh...)

Pity the .gov can't mandate a "low driver IQ" sensor. It would solve a LOT of problems encountered while driving in traffic. (not directed at OP)
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Unread 07-03-2012, 10:31 AM   #10
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TPS (or TPMS) are a brilliant convenience for those who use their cars as drivers and don't want to have to worry about all of the safety checks that most don't have the time for. Believe it or not people do pay attention to that light when it comes on, and come to fill their tires up. It's on a very short list of government mandated safety devices that I actually advocate for.

Whoever said it works off of tire RPM is only partially correct. The direct system actually employs a pressure sensor inside of the tire that transmits a live feed to the vehicles computer, based off of the actual pressure inside of the tire.

An indirect pressure sensor uses RPM sensors to detect slight variances in angular velocity from an under-inflated tire, sensors not located inside of the tire. The vast majority of vehicles out there today employ a direct system, the indirect system is fading away.

If the light is still on there may be a few things at play:

1. Your tires are actually under-inflated.

2. Your pressure sensors are not set for the tires pressure (I.E. from bigger tires that run a lower pressure- it takes 3PSI difference to trip the sensor).

3. Faulty pressure sensing system, in which case the light would actually blink.

4. You need to manually reset the tire pressure light VIA button, normally located on the bottom of the dash panel.
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Unread 07-03-2012, 10:41 AM   #11
paul84043
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Most of the time you need to overinflated your ties by about 5 psi and then back down. I believe they trigger around 32 to 36 psi.
I like the tpms system, it's shown me my last 4 low tires before it ever became an issue. If you don't like it, get a procal or other module and turn it off.
The current jeep system has nothing to do with rpm. It's direct pressure reading.
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