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Tyre deflation warning

1.2K views 13 replies 9 participants last post by  iainmcdermott10  
#1 ·
This needs some serious attention on Heath and Safety Issues!
I had a software update yesterday (may not be related).
Today, after driving about 15 miles I pulled onto the A1 Southbound - a 2 lane dual carriageway with no hard shoulder, after about 5 mins or so audible 'Bing' - Tyre Loss of Pressure Deflation Warning. There was no where to stop safely on a 2 lane A1 (M) road, so I slowed down to abt 35-40mph on the A1(M) and gripped the steering wheel hard just in case the tyre blew out.
I continued cautiously, monitoring there was no pulling to one side or other indication of immediate danger. After about 15 miles at the next junction I was able to pull off and proceeded to a safe place to stop where I could check the tyres. No obvious nails or punctures. Needless to say I was in my best clothes, having to kneel down in rain and get my hands filthy checking round the tread.
After checking the tyre pressure at a garage I found there was absolutely NO PROBLEM.
The initial danger warning could have got me KILLED if I had stopped on the A1 immediately.
Action needed: differentiate between SUDDEN LOSS OF PRESSURE and a REMINDER TO CHECK THE TYRE PRESSURES.
Far from impressed!
 
#2 ·
Yeah, thats the downside to a TPMS system that monitors each wheel rotation rather than a tyre pressure gauge in each wheel.

Another annoyance I found, if your tyre is already flat before you drive off the car can't tell you until your a few hundred yards down the road, obviously the wheels have to rotate for a certain amount of time for the car to calculate theres an air loss. :rolleyes:
 
#4 ·
Thanks I've just edumucated myself from Wiki re iTPMS systems. I now know a bit more abt how it works and it would seem that the delay [20-60 mins] before reporting the loss of pressure is due to the software learning phase.
So the warning ties up with that timing but my concern is I very nearly pulled over because I thought I had a puncture and thought I would have had to stop and change the wheel anyway a short distance down the road even though there was absolutely no where safe to do so. For others info DONT PANIC ...
I am increasingly frustrated by the technology forced on me [by the EU ]- mainly the Lane Discipline that stops you taking avoiding action to avoid a cyclist or a cat so the car tries to kill the cyclist on its own by swerving back to hit them unless you have had time to indicate.
The driver should be able to permanently disable the action and possibly get a substitute audible warning if you start to wander across lanes.
 
#3 ·
Sounds like what you experienced was simply a false positive. I’ve had it a handful of times. Software is rarely flawless so unless this is happening with frequency, I would just forget about it.

I’d personally rather have the occasional false positive than no warning at all prior to a potential blowout - particularly at speed.
 
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#8 ·
Would you rather no warning and drive around on a flat tyre until you felt it? Do you panic when it pops up fuel low? It's a warning, and you should be able to tell by the feel of the car if its serious or just a warning. If they still all look the right size no need to go to the extent you did.

Had this recently on my Volvo, car felt OK so carried on until it was safe to stop, all looked OK so finished my journey. Checked later, and the indicated tyre was in the 20's rather than the 34 psi it should be. Without the warning I wouldn't have known.
 
#11 ·
It's not just the ABS speed sensors that are used. Engine load/torque, yaw rate, acceleration, braking and more are used. A delay occurs when various conditions are detected including slippage due to poor road surface. Everything nowadays is so complicated and frequently not very friendly.
I'm sure my printed owners manual is thicker than a Boeing 747 Jumbo jet!
 
#13 ·
Hi, if you are dissatisfied with the situation, you can at least upgrade it. I am very satisfied with the comprehensive solution, and since the conversion, I have a tolerance of 0.3 bar at which the system does not yet trigger an alarm. In addition, it responds immediately, as you may be familiar with from the Tiguan or Passat. Ultimately, it is the same system. The upgrade is not inexpensive, but if you can convert it yourself, you can save a significant amount of money.

The conversion is described very well in the Skoda Forum.


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owns 2020 Volkswagen T-Roc R
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#14 ·
At least you got a warning, that fortunately didn't amount to anything. Imagine if you had been in a car without TPMS and had a sudden loss of pressure. What would have happened then and whose fault would that have been then?

Some people just love to moan. Perhaps you would be happier in something like a 1975 Ford Cortina instead of a modern car packed with safety features intended to save your life.