Tire Pressure Monitor Sensor Malfunction

[RB2004]

My wife and I purchased our first RV. We purchased a 2023 Leprechaun 230FS.
The tire pressure sensor indictors come on after 30 minutes of drive time ever since we took possession of it. I returned this RV the next day to the service dept. to repair this problem and a other problem with the slide. Slide was fixed but the TPMS's are an on going issue.
The dealership has given up, and point us to Ford, they have done everything they could and have contacted their engineering people with this issue, and we're waiting for their response.

I contacted Coachman and they say it's their understanding that there is an interference issue between the TPMS and possibly the radio they installed.

Has anyone else with this make, model on a E450 Ford chassis experienced this problem.

Thanks!

 

[jadatis]

TMPS sensors are activated, or by movement, or by 133mhz signal from the receving unit with display.

I think yours is the second.
Then signal is not send by unit or some disturbance.

Do all the wheels react that slow, or only rear.
Then it could be a distance problem like traveltrailers often have.

 

[RB2004]

Hello,
Yes I agree with the second one, and yes all 6 of 6. Information screen will state "Tire pressure sensor fault" with the tire image lit up.
I'm waiting for Ford to get back to me on their thoughts on this issue.
I was wondering if anyone else out there had this problem with their Class C from Coachman?

Thanks for your reply!

 

[jadatis]

Then I think I undersood wrong.
Thought the pressures where only given after 30 minutes driving.

But now I make if your post, that tmps works in the beginning, but fails afted 30 minutes drive.

 

[RB2004]

Correct.
After 30 minutes of driving the information screen makes the statement and the tire icon lights up.
Ford & the RV dealership with Coachman assistance have tried to reset but the system just won't respond and correct.

Going to wait for Ford's engineering people to find a solution and if they can't see what the options are after that.

Thanks again!!

 

[jadatis]

Some sugestions

Unit side
Software bug> needs update.
Not repeating 133mhz starting signal so sensors go back to sleep after a while.
The already mentioned disturbance.

Sensors side

Almost empty battery so in begining enaugh volts, but to low voltage after a while (30 minutes)

Would it be possible to, yust as for carsystems, to read out the errorcodes?

 

[Philhege]

Late to the party, but I have a 2023 298KB; same problem. I’ve gotten very good at hitting the OK button on the steering wheel.

Seems this is a finger-pointing exercise between the makers of the disparate onboard Bluetooth systems. Our Coachmen service guy shrugged his shoulders. I haven’t contacted Ford because the owner forums out there show that this is a multi-year problem with no resolution.

 

[Odyknuck]

Appears its a common issue and no one has a solution. I would have Ford disable it and buy an aftermarket system like TST and move on.

 

[Larry-NC]

Nope

Late to the party, but I have a 2023 298KB; same problem. I’ve gotten very good at hitting the OK button on the steering wheel.

Seems this is a finger-pointing exercise between the makers of the disparate onboard Bluetooth systems. Our Coachmen service guy shrugged his shoulders. I haven’t contacted Ford because the owner forums out there show that this is a multi-year problem with no resolution.

Nope. Couldn't possibly be a Bluetooth interaction.

TPMS operating frequency: 133 MHz.
Bluetooth operating frequency: 2.45 GHz = 2450 MHz.

That would be like blaming TV Channel 2 for interfering with your reception of TV Channel 9.

 

[wmtire]

TMPS sensors are activated, or by movement, or by 133mhz signal from the receving unit with display.

I think yours is the second.
Then signal is not send by unit or some disturbance.

Do all the wheels react that slow, or only rear.
Then it could be a distance problem like traveltrailers often have.

More info on interference

https://www.tirereview.com/tpms-radio-frequency-theory-operation/

https://www.brakeandfrontend.com/tpms-sensor-signals/

 

[Larry-NC]

More here...

More info on interference

https://www.tirereview.com/tpms-radio-frequency-theory-operation/

https://www.brakeandfrontend.com/tpms-sensor-signals/

More here:
TPMS sensors are available in two frequencies: 315MHz and 433MHz. TPMS signals transmit at 433MHz in Europe and at 315MHz in most parts of the world. When replacing a TPMS sensor, be sure to verify it has the correct electromagnetic wave frequency for the vehicle system.

Source: https://www.ateq-tpms.com/en-us/article/best-practices-tpms-sensor-replacement/
The entire article is informative and may be helpful in understanding the cause of the 30-minute dropout.

 

[Philhege]

Nope. Couldn't possibly be a Bluetooth interaction.

TPMS operating frequency: 133 MHz.
Bluetooth operating frequency: 2.45 GHz = 2450 MHz.

That would be like blaming TV Channel 2 for interfering with your reception of TV Channel 9.

Thanks. I fell for more hearsay, obviously. Still looking for a solution.