TPMS Numbers Don’t Change

[ACB8]

My 2016 2500 TPMS is showing the pressure for each tire but it doesn’t change and it’s incorrect. I’ve added and removed air and no changes. I drove for 30 miles and waited 20 plus minutes and no change. I checked the RF hub behind the back seat and there’s nothing obvious that is wrong. I used AlfaOBD to turn the system off and back on but no change. I’m tapped on ideas. Any help would be greatly appreciated.

 

[ACB8]

My 2016 2500 TPMS is showing the pressure for each tire but it doesn’t change and it’s incorrect. I’ve added and removed air and no changes. I drove for 30 miles and waited 20 plus minutes and no change. I checked the RF hub behind the back seat and there’s nothing obvious that is wrong. I used AlfaOBD to turn the system off and back on but no change. I’m tapped on ideas. Any help would be greatly appreciated.

 

[huntergreen]

Sounds like you need new sensors.

 

[ACB8]

Changed out the sensors yesterday. Nothing changed. Still shows the same pressures. So frustrating.

 

[Atcer2018]

Changed out the sensors yesterday. Nothing changed. Still shows the same pressures. So frustrating.

Are you the original owner? I ask because if it’s a new to you truck a previous owner may have made or added something to show a constant PSI in all tires to avoid the warning alerts.

 

[ACB8]

I bought it in October and has been working correctly up until about a month ago.

 

[ACB8]

Does anyone know how to test the TPMS module to see if it’s working correctly?

 

[BossHogg]

Does anyone know how to test the TPMS module to see if it’s working correctly?

The only way I know is by using a tool designed to interact with a tire pressure sensor. The tools are readily available but will cost you a couple hundred for one of reasonable quality.

The TPMS has been working correctly until about a month ago.
Did the TPMS lamp flash or illuminate and stay on? This would indicate an issue with the system.
The new sensors, are they compatible with a 2016 RAM?
Are all your keyfob buttons working correctly?

It is highly unusual for all four tire sensors to quit working at the same time. Their lifetime is typically greater than 10 years. Something has changed.

It looks like the RF Hub may have failed but it should be able to say so through DTCs at the minimum. I would think the TPMS system would be squawking about not hearing any of the tire sensors. Have you scanned your vehicle for any DTCs? I read the TPMS section in the owner's manual but there isn't much information on system failure, nothing more than the TPMS light flashing at ignition on and then the TPMS lamp staying illuminated.

 

[gfh77665]

I would just ignore them.

 

[Rado]

Have you tried adding 5+ lbs more air the Specs
Let sit a few minutes then lower PSI back to specs ?
Sometime that has to be done to help reset monitor
Please Update what you do find out ! Thanks

 

[Mister Luck]

Does the spare have a TPMS ?

 

[Rado]

Did you use a tool to reset the TPMS ? Curious

 

[jws123]

Changed out the sensors yesterday. Nothing changed. Still shows the same pressures. So frustrating.

Did you reprogram the sensors? You need a scan tool to do it.

 

[Mister Luck]

Some Window tint will interfere with the TPMS signal

 

[huntergreen]

Some Window tint will interfere with the TPMS signal

Since I know nothing about window tint, can you explain this ? Thanks

 

[Mister Luck]

Since I know nothing about window tint, can you explain this ? Thanks

I would imagine Frequencies (radio waves) associated with the TPMS are blocked by metallic particles that some window tints use.
Some frequencies that use higher bandwidths in the spectrum can be interrupted by atmospheric conditions like dust or smoke..
This is just from my experience using Ham and GMRS frequencies

Window tint is mentioned in your owners manual under TPMS

“Radio waves are part of the electromagnetic spectrum just like the light waves that we see. Light waves, radio waves and all of the other electromagnetic waves travel at the speed of light—about 300,000,000 meters per second!” NASA


It looks like most RAM Truck TPMS frequencies are 433MHZ but some Dakota’s are 315MHZ

 

[huntergreen]

I would imagine Frequencies (radio waves) associated with the TPMS are blocked by metallic particles that some window tints use.
Some frequencies that use higher bandwidths in the spectrum can be interrupted by atmospheric conditions like dust or smoke..
This is just from my experience using Ham and GMRS frequencies

Window tint is mentioned in your owners manual under TPMS

“Radio waves are part of the electromagnetic spectrum just like the light waves that we see. Light waves, radio waves and all of the other electromagnetic waves travel at the speed of light—about 300,000,000 meters per second!” NASA


It looks like most RAM Truck TPMS frequencies are 433MHZ but some Dakota’s are 315MHZ

Makes sense! Thanks Mr Luck

 

[18CrewDually]

Under RFHUB you can program the sensors but you need the 8 digit number off of each.

 

[ACB8]

When I connected to Alfa OBD it says I don’t have a TPMS module connected so I’m assuming my module is shot. It seems strange that I would still show numbers for tire pressure even though they never change.

 

[Mister Luck]

Tell us what you have done to your truck since you have owned it.
It could be as simple as wheel replacement or window tint.
Maybe obvious isn’t the issue.