Our Yeti is 6 months old. Recently the TPM warning light has come on about 3 times, each time I have checked the pressures and found a drop in pressure in the NSF tyre. Re-inflated each time and after a week or so it recurs.

 

I took the car into a tyre shop today to see if they could find a nail or something that had caused a slow puncture.

 

They told me there was nothing wrong with the tyre but that it was probably a faulty sensor.

 

This threw me as I thought the TPM worked from the ABS system (as in our Octavia) and these were not false alarms but real pressure loss. He said the sensors can leak and cause pressure loss.

 

Is he correct? If so I will take it backj to the dealer toget it fixed.

each time I have checked the pressures and found a drop in pressure in the NSF tyre.

It does work by comparing the rotation on the wheels, as you have seen alarm and the pressure loss how did you accept what they said.

There are NO sensors to cause a pressure loss, makes you wonder where they get these people from.

So I presume the tyre shop took the wheel off and tested it in a water bath, rather than just give it a visual inspection? You can test the valve area yourself with a bit of soapy water or spittle.

Sounds like a badly seated tyre or valve to me if there is no evidence of a puncture.

Edited 21 September, 20169 yr by Falmouthboy

If you are detecting a drop in pressure then there is a leak. No matter what they say.

So I presume the tyre shop took the wheel off and tested it in a water bath, rather than just give it a visual inspection? You can test the valve area yourself with a bit of soapy water or spittle.

Sounds like a badly seated tyre or valve to me if there is no evidence of a puncture.

 

I agree that a valve of badly seated tyre might be the cause, if as you said, when you tested the tyre the pressure had dropped there must be a cause.

As the above. If when you checked there is a drop in pressure the TPM is doing its job - and by detecting the loss of pressure early may have saved you tyre damage and possibly a whole lot worse. From your post I'd say trust the TPM and find a better tyre shop.

Was it the tyre shop that begins with "Kw"?  They do not, as a whole, have a good reputation for reliable advice.  They also have a reputation for recommending work and parts that aren't required, which strangely doesn't seem to have happened in this case - unless they wanted to try to sell you a replacement for the 'leaky' sensor.  Good luck to anyone who tries to fit such a thing since, as you say, the TPM is a function of the ABS system.  If the TPM has reported a loss in pressure and upon investigation you have found a tyre that was indeed under pressure then I suggest that talk of a "faulty sensor" is incompatible with the evidence, to put it politely.  Maybe the tyre shop trying to catch up with the modern "post-truth" world?  OTOH, there's plenty of anecdotal evidence that some of them have been well embedded there for many years.

 

I'd suggest that you take your car to Skoda dealer and see what they say.  Or at least to another tyre shop.  Even some branches of the chain I mentioned have decent people working for them.

Thanks guys, you have confirmed what I thought, I did not believe what he said, but he was very convincing that newest cars had some sensors built into the wheels that could leak, ": I have seen lots" he said!!

 

Unfortunately I did not have time for a big argument, as having rung in advance to check they were not busy I then had to wait about 45 mins before they had a look, and was running out of time.

 

FYI it was ATS who I have used for years and always found helpful and efficient in the past, I think this chap was an inexperienced ignorant bullsh*tter.

 

We have a problem with an intermittently sticking rear wiper so will be taking the car to Skoda anyway, and will get them to take a look then.

Thanks guys, you have confirmed what I thought, I did not believe what he said, but he was very convincing that newest cars had some sensors built into the wheels that could leak, ": I have seen lots" he said!!

 

 

 

That's true of many cars, even some Skoda's, but not the Yeti range.