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Discussion Starter #1
I have had my Jeep for 3.5 years now. After about 10,000 miles I upgraded wheels and tires and everything has been fine for about 2 years. At the same time I upgraded my wheels, I also purchased an AEV ProCal so I could get the tire pressures to work correctly and have the speedometer correct.

This last January (right after warranty ran out), the Jeep started having TPMS issues. I have had it at the dealer 4 times and they cannot fix it. It is driving me crazy.

The minute you start the Jeep it says "check TPMS system", then the warning tire flashes and eventually lights up. The TPMS system shows the correct tire pressure for all four tires. So I do not believe it is a sensor.

Again, I am at whits end, my local dealer is so bad at diagnosing issues like this. Any help would be appreciated....
 

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I have had my Jeep for 3.5 years now. After about 10,000 miles I upgraded wheels and tires and everything has been fine for about 2 years. At the same time I upgraded my wheels, I also purchased an AEV ProCal so I could get the tire pressures to work correctly and have the speedometer correct.

This last January (right after warranty ran out), the Jeep started having TPMS issues. I have had it at the dealer 4 times and they cannot fix it. It is driving me crazy.

The minute you start the Jeep it says "check TPMS system", then the warning tire flashes and eventually lights up. The TPMS system shows the correct tire pressure for all four tires. So I do not believe it is a sensor.

Again, I am at whits end, my local dealer is so bad at diagnosing issues like this. Any help would be appreciated....
Hi phansson,

I'm sorry to hear that this has not been resolved for you. If we can help get you to another dealership for a second opinion, please send a private message with your VIN!

Kori
Jeep Social Care Specialist
 

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Discussion Starter #3
I talked to the dealer again about 4pm and still not resolution to the issue.

They did test all of the wheel sensors and said that they are all testing properly.

The next thing they suggested was that it was the window tint on my vehicle....:atomic:

I am at whits end.
 

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Discussion Starter #5
Did you change the tire pressure warning setting? If so, what did you change it to?
I had it set at 32 with the ProCal and had no issues for about 1.5 years running the tires at about 34lbs. With the problem I am seeing now, I have moved the factory air pressure back to 46lbs and removed the pro cal from the system (factory reset).
 

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Discussion Starter #7
well it is 46 POUNDS per square inch.....
 

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Well first, 46 pounds sounds kind of high. What tires are you running?

Second, I notice you setting only a 2 pound difference between normal pressure and low warning. I would set the low warning no closer than 5 pounds away from the tire pressure
If your tires are 35 then you should set the alarm for about 30 tops. (air pressure will increase/decrease with change in ambient temp, and/or under load).

With only a 2 pound difference there is a good chance you will get false warnings if you fill up with warm air from a compressor and then bring the jeep out into the cold Winter.
 

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Discussion Starter #9
After the dealer had my Jeep for two days, they finally decided that the TPMS "computer" and they are replacing that tomorrow. Hopefully this will fix the issue.

I normally run my tires at about 34 psi, but did a factory reset and aired all the tires up to factory to seek if that cleared the issue. It did not, so I am hoping the dealer is correct with the TPMS unit is faulty.
 

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Discussion Starter #10
So here is where I am now.

Dealer finally said they believed it was the main control unit for the TPMS "computer" so that was replaced last Friday. Picked up the Jeep and everything was great until Monday morning. Same thing. Getting the "CHECK TPMS SYSTEM" and TPMS warning light.

They have checked all of the TPMS Sensors in the tires and they appeared to be working properly. Can the batteries get low where they have a weak or bad signal?

The dealer ship has had my Jeep for 7 days this year over this issue. I am sick of screwing with it.
 

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I don't know how your TPMS got set to 46 PSI for the warning, but that is definitely wrong. On my 2015 Sahara it did not start to give me a warning until the actual tire pressure got under 30 (normal PSI on the label called for 37).
 

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Discussion Starter #12
It is set at factory (according to them 37psi). Currently I am running all tires at 41psi trying to just get the lights off.

It isn't working...
 

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No, No, No. Factory recommended tire pressure is 37. The TPMS should be set to warn of low pressure at 30 PSI. That was the factory setting when I got my Sahara and it was never changed. The only reason I know it was set at 30 was one cold day my tires were at 29 and it kept warning me until they were all above 30.

It is set wrong.

Check your door decal for the "recommended" pressure. The alarm should be set at least 5-7 pounds below that. If you are running oversized tires, it should be set at least 5 PSI below what you normally run in the tires. Running tires in a Jeep at 43 will wear out the center of the tire first. They will not wear evenly. Take it back and make them reset the alarm to what it should be.

Sometime I wonder if those guys can even drive. When I used to let them rotate the tires on my Ram 2500, I would get it back with 60 PSI on all the tires. The tires said "max load xxxx at 60 PSI" so they aired them up. It rode like it was on steel rails. First thing I would do when I got home was let some air out.
 

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No, No, No. Factory recommended tire pressure is 37. The TPMS should be set to warn of low pressure at 30 PSI. That was the factory setting when I got my Sahara and it was never changed. The only reason I know it was set at 30 was one cold day my tires were at 29 and it kept warning me until they were all above 30.

It is set wrong.

Check your door decal for the "recommended" pressure. The alarm should be set at least 5-7 pounds below that. If you are running oversized tires, it should be set at least 5 PSI below what you normally run in the tires. Running tires in a Jeep at 43 will wear out the center of the tire first. They will not wear evenly. Take it back and make them reset the alarm to what it should be.

Sometime I wonder if those guys can even drive. When I used to let them rotate the tires on my Ram 2500, I would get it back with 60 PSI on all the tires. The tires said "max load xxxx at 60 PSI" so they aired them up. It rode like it was on steel rails. First thing I would do when I got home was let some air out.
No. I think you misunderstand.
If you read post 5, he has a procal and had set the pressure warning at 32 and it worked fine for a number of years.

What I believe he is saying is that he has reset to WARNING back to factory and is running an ultra high TIRE PRESSURE (46psi) in an effort to turn off the tpms light. With the warning back at factory and the tire pressure at a whopping 46, logic dictates the tpms system SHOULD be staisfied.
 

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So here is where I am now.

Dealer finally said they believed it was the main control unit for the TPMS "computer" so that was replaced last Friday. Picked up the Jeep and everything was great until Monday morning. Same thing. Getting the "CHECK TPMS SYSTEM" and TPMS warning light.

They have checked all of the TPMS Sensors in the tires and they appeared to be working properly. Can the batteries get low where they have a weak or bad signal?

The dealer ship has had my Jeep for 7 days this year over this issue. I am sick of screwing with it.
At this point I would say maybe a low battery or an intermittent battery contact or something like that. You have changed the board out... have them change the sensors too.
 

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They have checked all of the TPMS Sensors in the tires and they appeared to be working properly. Can the batteries get low where they have a weak or bad signal?
YES, this is possible. When I did my first tire rotation my spare wheel TPMS was putting out enough of a signal for a scan tool to recognize it, but not enough for the computer to. I swapped that sensor, all TPMS updated their new locations and the warning light went out. These were Mopar sensors, bought off eBay, in aftermarket wheels. I only had them for 6 months, but who knows how old they actually were.
 

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Discussion Starter #17
At this point I would say maybe a low battery or an intermittent battery contact or something like that. You have changed the board out... have them change the sensors too.
That is what I am thinking. I am going to request them to do this on Monday.

So I have aftermarket tires, 33's. What should I be running them at? I had an AEV ProCal and had them set to 31 so I could run the tires at about 33. After I had all these problems. I did a "factory reset" with the pro cal and just moved all the tires back up to what the dealer said it should be (41psi).

I appreciate the help, this has been a complete nightmare.
 

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That is what I am thinking. I am going to request them to do this on Monday.

So I have aftermarket tires, 33's. What should I be running them at? I had an AEV ProCal and had them set to 31 so I could run the tires at about 33. After I had all these problems. I did a "factory reset" with the pro cal and just moved all the tires back up to what the dealer said it should be (41psi).

I appreciate the help, this has been a complete nightmare.
According to the AEV quick reference guide, if you want to run at 33psi, the threshold should be set to 26psi. If you don't want to go that low, give yourself a larger margin than 2psi. My tire pressure increases about 3psi from cold to running. Currently, my tires are generally 33psi cold and get up to 35-36psi when warmed up. My lower threshold is set to 28psi.
 

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That is what I am thinking. I am going to request them to do this on Monday.

So I have aftermarket tires, 33's. What should I be running them at? I had an AEV ProCal and had them set to 31 so I could run the tires at about 33. After I had all these problems. I did a "factory reset" with the pro cal and just moved all the tires back up to what the dealer said it should be (41psi).

I appreciate the help, this has been a complete nightmare.
What should you be running them at? Good question! I've been trying to figure that one out for the last couple of weeks. One formula says 18, another one says 27... I give up. I run my 33's at about 32. One thing I do know is that I have fairy wide tires (305's) so with more rubber on the road to support the vehicle the less the pressure should be to equate the same thing as the stock tire. Haven't done a tire chalk test yet but I suppose I should. I don't have pro cal. I have the superchips tuner and I use it to set my warning pressure at 26. We're cold in Manitoba (we can get down to -40 in the dead of Winter) so I'll probably have to take that down a bit more, but that's the way it is for now.
 

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I would always start with the simple thing first... that being the sensors. They are cheap and plentiful and considering your dealer has spent so many hours with no luck (and likely not getting paid for wasted time), they should replace them all.
 
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