Tyre Pressure indicator. Gimmick?????

[beefa]

Based on the way it works, as mentioned above, you would have to assume that the wheel requires a given number of rotations for the sensor to be able to accurately measure the difference in the rolling diametre of the tyre. So a blow out or very rapid deflation may not allow you to drive far enough (hence enough rotations) for the computer to calculate there is a difference.

[pinzvidz]

I blew my tyre and it never went off. I did forget to reset it once i had the new one on there. And it went off.

Hmmm... I suspect the system has a very slow refresh rate, rather like a fuel gauge. Think of it this way - a fuel gauge with a real time connection to the potentiometer in the tank would swing all over the place whilst you're going around corners, braking etc. Usually fuel gauges update every 10 or 15 seconds so you don't see the wild swinging about. The same might apply to the tyre pressure sensors - maybe they only update every so often. So if suddenly you blew a tyre whilst driving, it wouldn't set off the warning. A slow leak, however, would be a different story.

[FL00DY]

Hmmm... I suspect the system has a very slow refresh rate, rather like a fuel gauge. Think of it this way - a fuel gauge with a real time connection to the potentiometer in the tank would swing all over the place whilst you're going around corners, braking etc. Usually fuel gauges update every 10 or 15 seconds so you don't see the wild swinging about. The same might apply to the tyre pressure sensors - maybe they only update every so often. So if suddenly you blew a tyre whilst driving, it wouldn't set off the warning. A slow leak, however, would be a different story.

lol yeh but surely this is more because you don't need a pressure monitor to tell you about a blow out You can feel that, a slow leak you can't feel and gives you time, in my story ^^^^^ for instance, to work out what wheel it is and if it's a problem with the tyre itself.

[PoloGTi]

Mine has worked every time the tyre has droped around 8psi or more i had a slow leek in a front tyre and every time i pumped it up and then when it went down 8psi it went off again. Also worked when i rolled a tyre off a rim and when i put the spear on it went off again after restetting. Why not drop 10psi out of a tyre drive down the street see if it comes on? After all nothing beats a good tyre gauge and then you know its going to be all good.

[Timbo]

I can happily report again that mine works. On the drive to work yesterday, it came on. So I stopped and checked the tyres. All 'appeared' OK but when I checked more carefully using a tyre gauge I found the right rear had 10psi. Nail!

[VEEDUB69]

Mine has come on twice from memory but when I look at the tyres I dont see any obvious issue, but I havent checked pressures yet, will now do so asap. Only had the car 3 weeks so thought it was just set wrong or someything. Nothing to say the dealership inflated all tyres correctly I suppose in pre-del.

[FL00DY]

Mine has come on twice from memory but when I look at the tyres I dont see any obvious issue, but I havent checked pressures yet, will now do so asap. Only had the car 3 weeks so thought it was just set wrong or someything. Nothing to say the dealership inflated all tyres correctly I suppose in pre-del.

Simple to troubleshoot. Pump all tyres to 40, hold down the tyre pressure button to reset it. If it goes off again then check your pressures, if one of them are down swap with the spare and take the spare to get fixed.

Also when I got my new tyres put on, I didn't reset the monitor and it beeped at me later on.

[Flaps]

I think its a gimmick.

I put 17's on with 225/45's and drove 5km to the tyre joint with different pressures - nothing happened.

After replacing the tyres with 205/40's still no alarm or warning after 10-12 days.

[FL00DY]

I think its a gimmick.

I put 17's on with 225/45's and drove 5km to the tyre joint with different pressures - nothing happened.

After replacing the tyres with 205/40's still no alarm or warning after 10-12 days.

I'm here to tell you it's not a gimmick. When mine was going off and I did the above mentioned steps my tyre guy found a small nail in mine and was able to repair the tyre. Had I not had the pressure monitor I would have been on a Sunday cruise somewhere changing my tyre on the side of the road, least with pressure monitor I was able to do it at home undercover.

[MACCAA]

But did you reset it each time you changed wheels/tyres?It won't work unless it's turned on.
Came on once for me.Sure enough,nail in tyre,slow leak.
Cheers
Len

[FL00DY]

But did you reset it each time you changed wheels/tyres?It won't work unless it's turned on.
Came on once for me.Sure enough,nail in tyre,slow leak.
Cheers
Len

Yeh good point Len. You have to reset the monitor every time you change tyres and change tyre pressures.

[Timbo]

Refer my experience earlier. It works, but you do have to set it

[shaneth]

Correct me if im wrong but from what i read if you set it on one set of tyres and you change wheels and they are different it should come on. It cant tell if tyres have been changed can it?????

[Flaps]

Correct me if im wrong but from what i read if you set it on one set of tyres and you change wheels and they are different it should come on. It cant tell if tyres have been changed can it?????

Exactly my point

[DaveMack]

Had exactly this experience.

Correct me if im wrong but from what i read if you set it on one set of tyres and you change wheels and they are different it should come on. It cant tell if tyres have been changed can it?????

I changed a wheel while one of my rims was being repaired. The sensor had been set and when the spare was put on (although it was at the same pressure as the one removed), the sensor went off. So I checked the tyre pressures and reset. Hasn't gone off since.

Not sure why it should go off if the pressures were the same, but here's a thought. When you set the sensor it probably has data about each wheel and a change of wheel may mean that slightly different balancing weights do not match the data it had when set ... so it throws a fault code.

Dave