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TPMS removal

PaulKH

New Member
Joined
Oct 5, 2018
Messages
20
Location
wolverhampton
Car
2015 B Class CDI Auto
Hi folks, not sure what area of the forum this question should live so picked here. I've a 2015 b class with a dodgy TPMS unit, it sees three sensors but not the forth even though all sensors are picked up by the tyre fitters scanner. my question is, is there anyone local to the midlands that could just map out the TPMS from the body computer?
MOT end of the month and it's got me beat.
 
I suggest you get it repaired and working before the MoT as the system is required by law on all vehicles from January 2012
An obviously inoperative system is a major fail
 
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Does anyone know if each tyre has an individual receiver and where I might find them?
 
Each wheel has an individual transmitter behind and part of, the tyre valve.
I don't know where the receivers are or if there's just a central module.
TPMS sensors are approx £80-100 each, most tyre shops sell and fit them
 
Thanks, from the limited info I can find out there could only be once central module monitoring all four tyre sensors but I can't find where the bloody thing is, tried the passenger footwell, I've swapped the the wheels around to see if it sees that I've but the suspect wheel on the rear but that would dependent on there being individual antennas over each wheel.
 
You might want to just change each sensor anyway. They are battery powered and designed to last between 5 -7 years. Even if you find out which one is faulty, the others will go soon after. KwikFit etc advertise replacements at much lower prices than the main dealers.
 
I can get them swapped for new cloned sensors for £66 but changing them all in one go is an expense I could do without but the flip side is not being confident that the one the car says is losing connection with is actually where it thinks it is, I've no idea if the tyres have been rotated for example.
 
I can get them swapped for new cloned sensors for £66 but changing them all in one go is an expense I could do without but the flip side is not being confident that the one the car says is losing connection with is actually where it thinks it is, I've no idea if the tyres have been rotated for example.

Just change the lot, they have become the biggest failure in MOT's since introduced.
Basically, if the car is not used they go to sleep to conserve the battery, that's why they need the car to move before they can wake up and give a reading. If the car is used every single day, the batteries will not last as long.
 
It would be much easier if it wasn't such an intermittent issue, all works fine for a few mile then it will fail to detect the same sensor each time even when it's been displaying the pressure prior to the drop out, bloody hate modern cars dependency on sensors.
 
It would be much easier if it wasn't such an intermittent issue, all works fine for a few mile then it will fail to detect the same sensor each time even when it's been displaying the pressure prior to the drop out, bloody hate modern cars dependency on sensors.
Would that not suggest a low battery? Wakes up when the car moves, gives a reading, then loses power? Just a guess.
 
That's my rational too the problem to, I took it to the garage to get replaced and the image of the tyre pressure monitor popped up with the very sensor missing, the guy passes his scanner over each sensor, all provided a signal and around 60% battery, that said; I now believe that the car has a single module to receive the signals that means it could possibly be a weak signal. I'm also hoping that seeing as the issue is only ever the front near side would mean the module is functioning normally as it's operating fine on the other three.
 
Single module, I think its under the boot floor (i.e under the vehicle). Sounds like you have a sensor that is failing to transmit far enough. I'd just change that module.
The valve stems on cars with sensors are obviously different to those without (i.e obvious to the MOT person)

R
 
Thanks for the heads up on the module location, given there is only one receiver am I right in guessing that each sensor is allocated its location and if the tyres are rotated then the system still believes the wheel is in its original location, ergo even though the fitter pulled what we believed to be the correct tyre it may not have been?
 
Not sure with MB but the Lexus system recognises the tyre position by signal strength
 
The plot thickens........... having swapped front & rear wheels over I took it out, the system worked fine, the graphic showed all four tyres and watched the pressures change slightly as I drove, after about 15 mins the graphic changed to a simple message of 'tyre monitoring active' then it lost connection as it has been but rather than showing which one was missing it simply showed the message of 'tyre pressure monitor inactive' tried it several times and the graphic showing the tyres has gone and all I get it that last message.
 
You really need to get the car on STAR to see what's going on and have the codes read
 
Mercland in Nuneaton too far?
 

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