Erratic tyre pressure sensors

[gaz]

Hi All.
Is anyone else getting yellow tyre warning messages on hot days and radio interference with the system?

Many thanks to all who contribute here.....its full of great info.

[peterb]

Originally posted by gaz
Hi All.
Is anyone else getting yellow tyre warning messages on hot days
Yes - until I re-set the system on a hot day. I wonder what will happen when the weather goes cold.


and radio interference with the system?
Not noticed that one, but then I mainly listen to my PhatBox. The radio only switches in for traffic news.

[TheBrit]

Hi Gaz!

I was getting a few oddities with TPM which now seem to have abated. When I had the problem, I hadn't washed the car for about 4 weeks (bad, I know) and the wheels were thick with brake dust, it was a hot, sunny day and I was thrrashing it on a back road playing with a new A8 4.2 in the twisties. TPM came up with a big red warning which lasted for 5 or 6 minutes, then randomly would throw either one or all four corners up as yellow.

After I washed the car, I checked tyre pressures cold and all four were one or two PSI down. I pumped them all up to 40psi and turned TPM off, backon and then did a store pressures - all fine now.

It's worth remembering that the system as fitted to the RS 6 only stores a reference value for each tyre, not an actual psi reading, so it's important to re-store the pressures any time you inflate a tyre or otherwise do anything thatmight upset the TPM sensors reference value.

As an aside, do you find it hard to locate a petrol station who's compressors air lines fit the RS 6? I use Shell for Optimax petrol, and their air lines never fit properly due to the TPM arial leaving only a short bit of valve sticking up. Every time I've tried, I've ended up losing more air than I put in, and the supplied compressor us next to useless. If you want a recommendation, get a Halfords Rapid Digital Tyre Inflator for about £30.

Cheers! :cheers:

Chris.

[Kyle]

I can't stand driving to multiple gas stations trying to find one with a decent air hose that's is working order, but not in use.

So, I got a small air compressor and accessories from Griot's Garage (http://www.griotsgarage.com) . I check it every time I wash it now.

[andyp]

Do U.S. cars have a tire pressure monitor? I couldn't see anything in the manual.

[TheBrit]

Originally posted by andyp
Do U.S. cars have a tire pressure monitor? I couldn't see anything in the manual.
To check for TPM, press the Menu button on the centre console by the side-mirror adjuster, scroll down to the SET item and click. If you have TPM, there shoul dbe a menu item there for it where you can turn it on or off and store the reference values.

Chris.

[TS]

Yes to the tire warning message, but no radio interference with the system so far.
After I've checked the tire pressure (which was pretty normal) I just re-set the values in the computer...

[andyp]

Originally posted by TheBrit
To check for TPM, press the Menu button on the centre console


Aaarrrgh ... another thing we don't have in the U.S. ... a menu button!