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Old 08-26-2015, 02:57 PM
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TPMS question

I recently bought new wheels and tires for my '15 JK Sport. The shop that I had mount the tires said that the tire pressure sensors from the original tires needed to be installed in the new tires or the TPMS light will come on, and that would cost extra. I did not realize I had tire pressure sensors in my vehicle, because the only option I opted for was A/C on my JK. So I paid for the shop to mount my tires and swap the sensors.

For reasons I will not get into, I am still running the stock tires and will be installing my new tires shortly. My concern is that the shop said they removed the pressure sensors from the original set of tires (currently on my vehicle) and installed them in my new tires. However, there is no "TPMS" light on my dash that I could see. This has me confused because the shop said if you do not have tire sensors on a vehicle that is supposed to have them (2007+ model years they said), the TPMS light should be illuminated.

The only thing I could think is that the shop just blatantly lied to me and there were never any sensors in my tires to begin with. How else can you explain the lack of the light being illuminated? Can someone verify that there were tire pressure sensors on my vehicle when I bought it?

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Old 08-26-2015, 03:00 PM   #2
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It takes about 7 miles of driving for the system to notice any change in sensors.

Yea, with no TPMS sensor at all, you should be seeing the TPMS light (after the 7 miles).

Do you have the Connectivity Package/group on your '15? If so, you have the EVIC and the tire pressures are displayed under the speedometer.

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Old 08-26-2015, 03:02 PM
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It takes about 7 miles of driving for the system to notice any change in sensors.

Yea, with no TPMS sensor at all, you should be seeing the TPMS light (after the 7 miles).
I definitely have not driven 7 miles since the sensors were removed. I will give that a try. Sorry, but I am not used to the liberal nonsense the government tries to impose on its citizens.
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Old 08-26-2015, 03:07 PM   #4
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All JK's have TPMS sensors that are mounted on the wheels, attached to the valve stems. It's not an option, it's a govt. mandate. A shop would have to charge extra to remove the sensors from your OEM wheels and attach them to your new wheels. If you currently have no sensors the light would be on. If you're running the original wheels then the sensors are on the wheels. As I said, the "wheels" have the sensors attached, not the tires. If I'm understanding you correctly, you don't have new wheels on at this point.
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Old 08-26-2015, 03:19 PM   #5
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The sensors are approximately 1" x 3" and 3/8" thick. They screw onto the end of the value stem that is inside your wheel.
When you break the tire down and expose the inside of the rim you will see them.
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Old 08-26-2015, 03:56 PM   #6
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Sorry, but I am not used to the liberal nonsense the government tries to impose on its citizens.
I think is has more to do with juries awarding big cash verdicts against companies who they feel have deep-pockets.

In the news today, a group has filed a lawsuit against several car manufacturers because they claim it isn't their fault if they forget to turn their car off in the garage. Apparently, they claim, such can result in CO poisoning and death. They believe that cars should automatically turn themselves off, after some preset time, after being parked in a garage.
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Old 08-27-2015, 07:49 AM   #7
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Quote:
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The only thing I could think is that the shop just blatantly lied to me and there were never any sensors in my tires to begin with. How else can you explain the lack of the light being illuminated? Can someone verify that there were tire pressure sensors on my vehicle when I bought it?
Government regulations require TPMS tire sensors on all new vehicles as of 2007. If the TPMS warning light is not illuminated it means that the shop moved the old sensors onto the new wheels.

Here is a generic pic of what one looks like. The valve stem is the only part you can see from the outside.

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Old 08-27-2015, 07:53 AM   #8
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the TPMS requirement came into law after the firestone fiasco i believe.
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Old 08-27-2015, 08:00 AM   #9
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If the TPMS warning light is not illuminated it means that the shop moved the old sensors onto the new wheels.
I believe the OP's question, originated in that he still has his old wheels on his Wrangler (and declined to comment on why his new wheels aren't).
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Old 08-27-2015, 12:02 PM   #10
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I believe the OP's question, originated in that he still has his old wheels on his Wrangler (and declined to comment on why his new wheels aren't).
It seemed a bit confusing but that's what it sounds like. I guess if the old wheels are on, so are the sensors.
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Old 08-27-2015, 12:49 PM   #11
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I guess if the old wheels are on, so are the sensors.
I believe the OP paid to have the sensors moved to the new wheels. So, there is some chance that he paid for that to be done, but they didn't.

Is there a way to tell from just the exposed value stems, if there is a pressure sensor on that wheel?
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Old 08-27-2015, 03:43 PM   #12
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Is there a way to tell from just the exposed value stems, if there is a pressure sensor on that wheel?

Maybe he could take the valve core out of the valve stem and attempt to slide a broomstick straw in it. He could possibly tell if it hits the sensor and stops or slides past the valve stem freely if there were no sensor.
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Old 08-27-2015, 04:49 PM   #13
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I believe the OP paid to have the sensors moved to the new wheels. So, there is some chance that he paid for that to be done, but they didn't.

Is there a way to tell from just the exposed value stems, if there is a pressure sensor on that wheel?
No. However, the tire shop should have the scan tool which can detect if the sensor is in the wheel, and it can also detect the frequency of whatever sensor is mounted if that's ever an issue for a customer. That's the easy way to do it other than letting the air out and breaking down the wheel which should only be done at a shop anyway. But, the scan tool eliminates that headache. If the old wheels are on I would think the shop left them in the wheels. If they didn't there could be liability issues. Plus, the TPMS is sensitive to begin with. If there were no sensors in the wheels, the light would be on.

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