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> OMG TPMS WTF???, TPMS
ruxCYtable
post Nov 14 2011, 10:15 AM
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So I just passed 2500 miles on my '12 Elantra Ltd. This morning my TPMS light came on on the dash so after I dropped the kids at school I stopped and checked my pressure. All four tires were at precisely 35.0 psi. WTF???


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Vinnie
post Nov 14 2011, 10:21 AM
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When it's cold tires lose pressure, and when their in use, they start to warm up and regain pressure.

Happens a in the winter / cold weather to most people.


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jamhandman
post Nov 14 2011, 10:27 AM
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Did the light ever turn off?


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roydjt
post Nov 14 2011, 10:29 AM
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Extreme temperature changes shouldn't trigger the TPMS. I'm not sure what the threshold is for the sensor to report, but it has to be at like 50-75% of typical pressure, even a 100* change in temp shouldn't drop pressure that much. Something else is afoot.

-Roy


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elantragt
post Nov 14 2011, 10:30 AM
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I don't know for sure if the Elantra is the same but my Forte has two lights. The TPMS light goes on if the actual monitoring system has a problem and the tire image shows low pressure in a tire. Which light is on? Also, there are other things that can potentially set off your TPMS light -- radar, microwaves, etc. It can also be due to a loss of sensor reading from one or more of the tires.


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mbenz
post Nov 14 2011, 11:00 AM
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The TPMS is Tire Pressure Monitor System what that is , is basically if your tires are low on air the sensor knows that and the tpms light goes on telling you till put air in your tires. Also when you get a flat tire it goes off obviously tongue.gif but when you put the spare on it stays on because there is no sensor for the donut. When it is cold as vinnie the tires can lose air "pressure". Our elantras i haven't had my light turn on but my car is always outside and in jersey it does get cold. Bigger vehicles such as trucks and suvs are more prone to it because there bigger and heavier. i know this because my moms Suvs have had that Ford expedition and dodge journey and Honda CRV the tpms light has turned on but after driving the tires warm up and it goes off.


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ruxCYtable
post Nov 14 2011, 11:31 AM
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QUOTE (Vinnie @ Nov 14 2011, 09:21 AM) *
When it's cold tires lose pressure, and when their in use, they start to warm up and regain pressure.

Happens a in the winter / cold weather to most people.

I'm well aware of that. Did you read my post? All of my tires are at precisely 35psi and the light is still on.

QUOTE (elantragt @ Nov 14 2011, 09:30 AM) *
I don't know for sure if the Elantra is the same but my Forte has two lights. The TPMS light goes on if the actual monitoring system has a problem and the tire image shows low pressure in a tire. Which light is on? Also, there are other things that can potentially set off your TPMS light -- radar, microwaves, etc. It can also be due to a loss of sensor reading from one or more of the tires.

The '12 Elantra has one light. It is solid on for pressure problem and blinks for a malfunction.


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Vinnie
post Nov 14 2011, 12:12 PM
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QUOTE (ruxCYtable @ Nov 14 2011, 11:31 AM) *
I'm well aware of that. Did you read my post? All of my tires are at precisely 35psi and the light is still on.
The '12 Elantra has one light. It is solid on for pressure problem and blinks for a malfunction.


Hey, respect is how we treat people here!

You did not say the light was STILL on... nor did you say the light turned off.


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elantragt
post Nov 14 2011, 12:35 PM
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Hey rux, club moderator Vinnie was just trying to help man. sad.gif


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ruxCYtable
post Nov 14 2011, 04:06 PM
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QUOTE (Vinnie @ Nov 14 2011, 11:12 AM) *
Hey, respect is how we treat people here!

You did not say the light was STILL on... nor did you say the light turned off.

Sorry for my perceived tone. I didn't intend it that way.

I went out to the car at lunch time, all four tires still at precisely 35.0 and after about five minutes of driving the light went off. Must have been a freak thing.


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volntitan
post Dec 1 2011, 07:45 PM
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Hey folks...

I'm having the same problem. Got in the car last night where the temp was close to freezing. TPM light on. Haven't measured the air, but all 4 tires look fine. Drove home on interstate (about 30 miles) and light stayed on the whole way. Parked in the garage and got into go to work this afternoon and light still on. This is the second time this has happened to me. The last time I took it to a tire shop and they checked the air, but said pressure was fine. Do I need to take it to the dealer? It is a 2011 Elantra with roughly 6,000 miles.


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Bobzilla
post Dec 2 2011, 08:56 AM
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BUY A tire pressure gauge, check tires manually. If they are all at required minimum pressure WHEN COLD, then take it to the dealer. If they are lower than the required minimum, add air, drive and see if the light turns off. If the light stays on with tires at required pressure, then take it to the dealer.

Other than the tire being EXTREMELY low or flat, you can't "look" at a tire to see if it's "fine".

In most of these systems it will take 2 drive cycles with the tires at correct pressure to reset the system and turn the light off. With the Acura's it's 2 9-minute cycles.


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