TPMS warning light on dash

[Dundee_Kev]

By taking it to a different garage who don’t know about the malfunction it would be a pass? .

They can't fail your van if it's illuminated, flashing, the fact they know it has a fault or the light is busy attacking passers by.

This is all assuming your van is not a caravelle as it will be registered as a car (M1) and is a van (N1)

As quoted from the MOT testing guide,

The inspection of the tyre pressure monitoring system (TPMS) is for M1 vehicles first used on or after 1 January 2012.

 

[Ricardo T]

Yes its a van so N1.

 

[Dundee_Kev]

Yes its a van so N1.

There you go then, case closed. It ain't part of your MOT

 

[Ricardo T]

So the story is….Soon after taking delivery of the van from new with factory fitted tpms I took it to Bognor Motors for some upgrades and mods, the wheels being one of them. Off with the standard Devonports and on with 17” Black Rhino Arsenals ( supplied by me) and General Grabber 235/65 x 17 supplied and fitted by Bmvs when they also swapped over the tpms valves to the new wheels and set up the new pressures into the tpms appropriate for this set up. ( in hindsight I should of checked what pressures they should of been set at as they set them far too high…in fact higher then the recommended max pressure of the tyre ( front 57psi rear 48) which is apparently what they were told at the time.)
This only came to light recently on another thread on here, Swamper tyre pressures I think.
Last year a fault came up on the tpms with the nsf wheel not registering, so I made the journey down to Bognor and they duly fitted a new sensor valve and reset the tpms, still with the pressures far too high.
A few months ago the same tpms sensor threw a wobbly and again wouldn’t register. So I thought this time I’ll take it to my local dealer who can replace the faulty tpms sensor under warranty and code in the ‘new’ lower pressures….or so I was hoping!
Duly dropped van off and soon after the dealer called to say they had swapped the front wheels over and the fault still registered as nsf… so not the sensor grrrr….. they could not investigate any further without fitting the original wheel/ tyre combo and tpms valves as their system could not accommodate the size of tyre fitted to the aftermarket wheels now on the van..ffs!
So appointment made with a cost of £72 per set x 2 to be swapped over and checked. The clock is ticking as the van warranty runs out the end of June which is when the mot is due. I know the fault is now logged with Vw but it’s just getting to the bottom of it and getting the mot done which I’m getting a bit nervous about.
The word ‘ module’ has been mentioned a few times.

Update on this....

So dropped the van of yesterday with the oem Devonports in the back for VWVC Ipswich to get to the bottom of it...or so i thought...
Had a call yesterday saying they changed over just the front two wheels and sensors with two Devons on the front which threw up a fault on the already replaced tpms sensor, so this was replaced under warranty with the light not active with the Devons on the front.
Today had an email/call to say the tpms light came on again when they were manouvering the van around the compound..ffs..so they swapped out all the wheels tyres and sensors to all Devonports and no light !! Test driven it a total of 30 miles too.
So i'm back with aftermarket wheels on, tpms light on dash an no sensors reading, so worse off than when i went in!! They are saying that because a sensor has been replaced the module doesnt recognise this on the aftermarket wheels and is telling the other sensors the same thing...im struggling to understand all this or is it bs!?
So the fault is due to non genuine wheels and tyre sizes. Not many T6/s like that around ha ha.

Is it possible to code out the direct TPMS altogether im thinking as its really becoming the bain of my life atm?

The fault code it is giving out is C111A31
The first mot is due the end of june and I've enquired at four different garages re pass/fail if tpms light on..50/50 so it seems like testers discretion and how they feel on the day!

 

[Kind of Blue]

Wheel sensors that is how my system operates T6 Caravelle, by detecting a change between wheel speed rotation and a persistent anomaly will be brought up. Some vehicles I understand have actual pressure monitors within the wheel tyre. When we change tyres to a different size be it wheel plus tyre or just tyre then it is important to set new tyres to within a pressure range suggested by either the vehicle manufacturer or by calculation from a tyre comparison site. The range then set on the tyre monitor on mine measured by wheel speed monitor. As we drive the tyres heat up and the circumference changes slightly as the temperature of the tyre goes up. If the tyres are not set up with the proper pressures including the differentiation between front and rear and weight, then a warning comes up because one axel set will get hotter than it aught too and therefore have a different pressure than it should so it would flag up for me especially if driven hard. So having tyres set a correct pressures for size is important. The other thing is wheel sensors in the T6 are notorious for failing it seams. I have had 4 wheel speed sensor replacements now and they set off a whole range of faults and system start crashing even things that to the uninitiated like myself seem completely unconnected. I wonder even if those vehicles with actual pressure sensor within the tyre and wheel still rely on the wheel sensors to some extent??