Hi All.

 

I have a Skoda Octavia Black est 2014, 18inch low profile tyres as standard.

 

I have found my Tyre Pressure Sensor  did not work when I had 0 pressure in 1 of my tyres.

 

It does not have valve sensors, I am told by a Skoda dealer that it works on circumference /diameter drop in the tyre.

 

This is not possible with low profile tyres as I could not tell the tyre was down till driven (these are XL tyres)

 

Any one else had the same problem, thanks

They are really to warn you of a sudden loss of pressure if you had been travelling at 40 or above it would have gone boing . The faster you go the rotation difference side to side is more pronounced and as it works with your abs does not even start to work till you are going over 10 mph ,

Further to my post, had sensors checked working fine, went on a camping trip put 2.50 bar in rear tyres and 2.30 front, reset sensors.

 

On way home speed 58mph, Tyre Warning came on pulled over and checked all tyre pressures, found pressure raised on all four tyres

this I took to be due to heat in tyre, drove further 400 yds warning still on! reset sensors no further problems.

 

Question is, why would sensor warning appear with raised tyre pressures which is normal when driving.

Interesting you raise this - as basically the same issue I've had see me post http://www.briskoda.net/forums/topic/359151-tpli-sensitivity/

I guess they have to be relatively sensitive to be effective, I might get my tyres filled with nitrogen (it's about 1.50 a tyre I think), see if that helps with the variance.

TBH, this is just another example of relatively useless technology taking ownership of a problem away from the user.

Before these types of system became available drivers should check their tyres before a journey or at least weekly.

If a sudden deflation occurs at speed, having a sensor going bong is, in my mind, an unnecessary distraction when in reality I am trying to decide (rapidly) on the best course of action!

If a sudden deflation occurs at speed, having a sensor going bong is, in my mind, an unnecessary distraction when in reality I am trying to decide (rapidly) on the best course of action!

 

Possibly more dangerous, when mine went 'bong' on the M4, the car felt ok but it then put doubt in my mind so had to stop on the hard-shoulder to have a quick look - which I think is never a good thing.

Further to my post, had sensors checked working fine, went on a camping trip put 2.50 bar in rear tyres and 2.30 front, reset sensors.

 

On way home speed 58mph, Tyre Warning came on pulled over and checked all tyre pressures, found pressure raised on all four tyres

this I took to be due to heat in tyre, drove further 400 yds warning still on! reset sensors no further problems.

 

Question is, why would sensor warning appear with raised tyre pressures which is normal when driving.

The system has no idea of the pressures, only a differential of rolling radius. The system will not identify to you which tyre is performing unusually, which I don't understand, I guess it must be to make you check them all. This technology is essentially a piece of software because all the hardware is already in place for the ABS system.

The system will not identify to you which tyre is performing unusually, which I don't understand, I guess it must be to make you check them all.

 

Yes it will.

my mistake, the older versions I've experienced don't.

Its a good point - all the 'real' times I've had a puncture its actually stated the actual wheel and then I've located a screw in the tyre, so works well on this front - and all the other 'false' times its just stated I need to check the pressures all round.

Thanks all for the feed back, I contacted my Skoda dealer today they said they have never heard of it and could not explain it.

 

Further info for interest, I set my tyre pressures before my camping trip, + full tank of diesel, drove at 62mph were possible no issues, on way back less weight

less fuel and less speed, warning tyre sensor kicks in, I don't get it?

At which point did you reset the TPLI after setting the pressures?

 

The system is to detect a sudden loss of pressure, hence why it has been renamed to TPLI since about October 2014 onwards.

 

It will detect slow punctures, but usually gets it wrong as it isn't designed for that.

 

@Exeterj, if all 4 come on then the system has got 'confused'. At a guess, it wouldn't let you resave the pressures without cycling the ignition either.

It's a useful thing, I had it alert me to a slow puncture (screw in tyre) just before a motorway trip.

Only issue I ever had was after a wheel and tyre replacement (from motorway pothole damage) where it took time to settle down and indicated a tyre pressure issue 3 times on one journey even with TPS reset each time - all tyres were fine. After that journey it was Ok ever since.

At which point did you reset the TPLI after setting the pressures?

 

The system is to detect a sudden loss of pressure, hence why it has been renamed to TPLI since about October 2014 onwards.

 

It will detect slow punctures, but usually gets it wrong as it isn't designed for that.

 

@Exeterj, if all 4 come on then the system has got 'confused'. At a guess, it wouldn't let you resave the pressures without cycling the ignition either.

 

Hi, there was no loss of pressure but an increase, I stopped the car turned off ingnition turned on and reset  no further problems.

I set the TPLI after tyre inflation increase due to weight increase (tyres cold) start of journey! no problems, it was only on my way back that the warning came on

as I say no loss of pressure but an increase in pressure.

 no loss of pressure but an increase in pressure.

 

I think someone said above, it works on the rolling circumference of the tyre, therefore (I put mine down to at least) the increase in pressure presumably due to being hotter has made the tyre larger and thus changed the rolling circumference.

 

For me its just a case of seeing if this variance in pressure can be avoided - not really the fault of the TPLI as I guess all tyres do this, I just wouldn't have known about it on my older cars without it.

I am £100 better off today thanks to the TPS. Two weeks ago it told me I had a problem with the rear right. I checked and it was a couple of pounds down. Topped up and carried on. Today same warning so I went to the tyre shop. Found a tiny nail in my new Bridgestone. Easily repaired for £10 as it had not been run flat. That is simply clever!