I've only had my 2011 Superb for approx. 3 weeks and the tyre inflation warning illuminated and bonged again today, a fortnight after it first came on.

 

I knew about resetting the system by pressing the button.

 

I've got no choice but to call in at a very local 'fast fit' place to see if I've got a slow puncture, which will somewhat stain my feelings towards the car. I know it's just bad luck, but I've had a few other gripes since purchase, too.

 

I wonder whether one of the tyres (NSF) being a different brand might be triggering the tyre warning? It's the same speed rating and size but a slightly different tread pattern. I did grumble about this to the selling dealer but they said as long as the tyres were safe, it's hard cheese.

Maybe I'm being dopy here, but, have you checked and corrected the tyre pressures before resetting the TPS thing?

Yep, when the warning first came on 2 weeks ago, I pumped the tyres up before resetting, so it'd be a bit pants if they've naturally lost enough pressure since then for the warning to come on again.

20 pence at an ASDA Filling station pump gets 2 tyres inflated, 50 pence other places gets 2.

£10 get a good Tyre Pressure gauge which means you can check pressures any time.

 

Not difficult to see if the pressures are dropping, or if one is.

& 

The same numbers on the side of a tyre of different brands does not mean the tyres are the same size, sometimes quite a bit off actually.

That's interesting, Offski - I thought if all four tyres said 225/40 R18 92Y it would mean they're all the same size, even if the tread patterns were different.

As Offski wrote, I once had an issue when buying 2 P600s for my Cav GSI 2000 4x4, then bought another 2 P600s from a different source, that annoyed the four wheel drive system a bit! Turned out they were from different factories/batches/versions and while the tread depths front and back were nearly the same, the circumferences were quite different.

 

If in doubt about that bit, mark the lowest point on each wheel with white chalk and push the car until some of the marks are back at the lowest point, if one, ie this new one, is different, then take that up with your supplying dealer.

Different rolling radius /shouldn't/ cause a tyre pressure warning. When you hit the reset button you're telling the controller that what it sees at that point is the normal setting and to monitor for deviation from there. If you had one tyre flat and hit the reset button it'd only monitor for further deviation from there.

 

When I bought my car, it came with a slow puncture: I was getting a TPMS warning every week. The supplying dealer had fitted two new front tyres and it turns out the inner bead on one hadn't quite sealed to the rim. Once it was reseated it was fine.

 

If you have access to VCDS, I think it'll tell you which tyre it thinks is the problem and you can work from there.

Very true. & if no access to VCDS

4 minutes checking all 4 tyres pressure will tell easily if the pressures are as they were when you put in the air and reset the TPMS.

Best be safe.

My rear left loses 5-6 psi every two to three weeks. I have had the pressure up to 50 psi in a water tub and no bubbles. So just accept it but my tpm system picks it up all the time.

So you might have one tyre dropping pressure.

I had this problem on my Elegance with it's 225/40 x 18 tyres. I've since learned that these low profile tyres are very susceptible to pothole damage. My O/S front would lose pressure over a couple of weeks - nothing serious but just enough to trigger the TPMS warning. I decided to have the tyre replaced as it was near the end of it's life anyway and was advised by the tyre bloke that the structure of the tyre was delaminating internally - no visible damage on the outside. He suspected that it had been caused by a pothole and I'm inclined to agree.

 

Dave

One thing that I am uncertain of with the TPMS - does it require the vehicle to be rolling when you reset it, or does it somehow hold the setting until the system can acquire the readings from the ABS sensors? 

I think that the best plan is to check the tyre pressures, press the reset and drive to let it learn the (correct) values from all four wheels.

Different rolling radius /shouldn't/ cause a tyre pressure warning. When you hit the reset button you're telling the controller that what it sees at that point is the normal setting and to monitor for deviation from there. If you had one tyre flat and hit the reset button it'd only monitor for further deviation from there.

 

When I bought my car, it came with a slow puncture: I was getting a TPMS warning every week. The supplying dealer had fitted two new front tyres and it turns out the inner bead on one hadn't quite sealed to the rim. Once it was reseated it was fine.

 

If you have access to VCDS, I think it'll tell you which tyre it thinks is the problem and you can work from there.

 

I agree completely, but I was just replying to a posting that suggested that they might have different tyres, so how to check that.

I've been told that just hitting a large bump can sometimes set the warning light off

I've had it 4 weeks in a row once before and put it down to the above as the pressures were all spot on and the same brand tyre

Pour some soapy water around the valve seal to check if its leaking; I had one that had a bad seal once.

i had one of the front tyres replaced when i had a puncture, the other tyre has a bout 4 mil left on it , now the TPMS goes off every week or so . I'm assuming it's detecting a mismatch in rotating speed

Edited 24 December, 20169 yr by peterposh