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Old 11-13-2013, 01:31 AM   #1
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TPMS light

Hi guys, quick question, noticed tonight that little yellow exclamation mark light lit up displaying low tire pressure. I used my gauge and checked all four my tires excluding the spare and all were between 23-29psi...so I then used my air compressor and inflated all 4 tires psi back up to 30-31. So I'm driving back home and the light is still staying lit. Is this cause for concern, anyone else dealt with this issue. Before someone asks, yes I have read the manual and it clearly states the reason for the TPMS light when it comes on. Just need feedback on what I should do if light doesn't go out.

Tom
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Old 11-13-2013, 01:43 AM   #2
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Got the same problem, I have it with two tires though. Sensors are probably shot.

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Old 11-13-2013, 03:36 AM   #3
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How far did you drive? From what I have read around here some of the TPMS require a bit of time/driving to "reset" themselves.

I think factory recommended pressure is 35 psi on the door jamb (at least on my 2013) - I am not sure where it "triggers" the TPMS (ie whether at 30 it may still be "low" based on that).

I would suspect the reason for the TPMS light per the manual is......low tire pressure. LOL!
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Old 11-13-2013, 07:17 AM   #4
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Check the pressure in the spare.
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Old 11-13-2013, 07:57 AM   #5
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Quote:
Originally Posted by JimsJeep View Post
Check the pressure in the spare.
I thought tpms only reads the 4 on the ground?
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Old 11-13-2013, 08:45 AM   #6
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Quote:
Originally Posted by mommymallcrawler View Post
I thought tpms only reads the 4 on the ground?
Correct, it does. The Tire Pressure Monitoring (TPM) system
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Old 11-13-2013, 11:47 AM   #7
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Quote:
Originally Posted by mommymallcrawler View Post
How far did you drive? From what I have read around here some of the TPMS require a bit of time/driving to "reset" themselves. I think factory recommended pressure is 35 psi on the door jamb (at least on my 2013) - I am not sure where it "triggers" the TPMS (ie whether at 30 it may still be "low" based on that). I would suspect the reason for the TPMS light per the manual is......low tire pressure. LOL!
Not far, less than a mile, it just popped on...I'll just keep an eye on it.
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Old 11-13-2013, 12:07 PM   #8
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Quote:
Originally Posted by mommymallcrawler View Post
I thought tpms only reads the 4 on the ground?

Silly me, I should know better. Everybody else reads all 5
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Old 11-13-2013, 12:37 PM   #9
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Quote:
Originally Posted by JimsJeep View Post
Silly me, I should know better. Everybody else reads all 5
So does it read 4 or all 5?
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Old 11-13-2013, 12:59 PM   #10
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Just the 4 on the floor not the spare
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Old 11-13-2013, 01:55 PM   #11
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Quote:
Originally Posted by TomJeepWrang13 View Post
So does it read 4 or all 5?
Already been answered, with links.
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Old 11-14-2013, 09:05 AM   #12
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Here's a weird one for ya:

A few months ago, my TPMS sensor light started coming up regularly although all 5 tires were well within the ECU's 'acceptable' range. However, it would usually turn off after stopping/ parking for any length of time.

I was thinking that one of my sensors must be bad (or worse!) and was just about at my wits end. I researched the subject and learned that if the light is blinking for over a minute (as mine was), it means that there is a communication error. Then I read that certain cell phone chargers somehow interfere with the TPMS systems (RF noise, maybe?). Lo and behold, I had just bought a new 'rapid' charger and always kept it plugged in.

I unplugged the charger and haven't seen the TPMS light since!
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Old 11-14-2013, 06:47 PM   #13
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Quote:
Originally Posted by TomJeepWrang13 View Post
Not far, less than a mile, it just popped on...I'll just keep an eye on it.
Happened to me this week as well. I noticed on the restart it actually told me "rr" and "lr". They were all around 30. I aired them all up to 35. The light took about 5 miles to go out.

Good luck.
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Old 11-15-2013, 07:53 AM   #14
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On my 2010, recently bought used, the light stays on all the time. Jeep dealer says all 4 monitors are not working and I'm looking at about $100 each for repair. I'm thinking black electrical tape over the dash light will work fine. I've been driving 40 years just fine without them. My jeep dealer says it is a common problem.
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Old 11-15-2013, 08:03 AM   #15
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Yesterday my TPMS came on indicating "rr" and "lr" just like those above. I put 35 pounds of air all way around (they were a few pounds off) and then drove 70 miles. The lights and chime is still there every time I start the car. Going to the dealer this morning. To me, it seems like if TWO tires come on at the exact same time, something is wrong.
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Old 11-15-2013, 11:51 AM   #16
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UPDATE: I was using a professional tire gauge, the type you used to find at all service stations. Turns out the old gauge was wrong. I was 6 pounds low according to the digital gauge at the dealership. The light went off immediately. I stopped at Advance and bought a new gauge, knowing full well that cheaper gauges arent accurate. I checked all four tires and it read exactly the same... 3 pounds lower than the dealerships. That's OK, as long as every tire reads the same. Now, I just add 3 pounds to my reading when I air-up the tires

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