26 minutes ago, Audi Q6-Etron said:

Just had a look at the online manual rather then the Audi website technical information,

From the Q6 manual it does state it will tell you which tyre, which is interesting as mine did not tell me so can only assume it thought two were low at the same time which again unusual and strange to have two at once go low, so interesting as online it states it does not yet the manual says it does.

Tyre pressure loss indicator

Introduction

Within the system limits, the tyre pressure loss indicator in the instrument cluster informs the driver if the tyre pressure is too low or a system malfunction has occurred.

The system makes use of the ABS sensors to compare the rolling circumference and the vibration of the tyres. If changes in the inflation pressure are detected on one or more tyres, the driver is alerted by an indicator lamp  and a message on the instrument cluster.

If only one tyre is affected, the display will indicate its position. The tyre pressure loss indicator on your Audi is specially matched to Audi Genuine Tyres Information on new tyres or wheels. Audi recommends that you use these tyres.

Each time tyre pressures are changed (e.g. when switching from partial load to full load and vice-versa) on your vehicle, or after the tyres are changed, you must store the new tyre pressures Storing tyre pressures in the tyre pressure loss indicator. Monitoring of the tyre pressures is based on the tyre pressures you have stored. The inflation pressures recommended for your vehicle are given on the tyre pressure sticker refer to.

The rolling circumference and vibration can change and cause a tyre pressure warning if:

The inflation pressure in one or more tyres is too low.

The tyres have suffered structural damage.

The wheels were changed or the tyre pressures were changed and the new tyre pressures were not stored Storing tyre pressures in the tyre pressure loss indicator.

Only some of the worn tyres have been replaced.

Please note that the tyre pressure loss indicator may fail if there is an ESC fault. When driving with snow chains, the warning may be triggered erroneously or a system malfunction may occur.

Set your tyre pressure, reset tpms . Go for a 15 minute drive . Return home and let a tyre down . The above process should either tell you or won't.

Some safety systems are default across brands and models . I very much doubt if Audi would engineer a system for a SQ5 and leave it off a Q6 e Tron . Your above statement reinforced my previous post from my manual.

5 minutes ago, Audisq524 said:

Set your tyre pressure, reset tpms . Go for a 15 minute drive . Return home and let a tyre down . The above process should either tell you or won't.

Some safety systems are default across brands and models . I very much doubt if Audi would engineer a system for a SQ5 and leave it off a Q6 e Tron . Your above statement reinforced my previous post from my manual.

You would need to go for another drive as the passive state will only alert when moving

I am debating whether to fit an after market system as there are a few that have a phone app and work via CarPlay. Only issue is the hassle and cost of getting the sensors installed. I’m not keen on the large valve cap style as they’d put strain on the rubber valves, so would need to be tyres off and metal valves and internal sensors fitted for me.

4 minutes ago, PhatGit said:

You would need to go for another drive as the passive state will only alert when moving

Your telling me the car wouldn't pick up a flat tyre and would you allow you to start a journey without any warning. I find that hard to believe.

8 hours ago, Audisq524 said:

Your telling me the car wouldn't pick up a flat tyre and would you allow you to start a journey without any warning. I find that hard to believe.

Why is it so hard to believe? The system is based on the ABS sensors if the car is not moving they won’t be doing anything to be able to see a difference

39 minutes ago, PhatGit said:

Why is it so hard to believe? The system is based on the ABS sensors if the car is not moving they won’t be doing anything to be able to see a difference

I get what your saying, I'd of thought both systems would at least know a tyre was totally flat , without the need for a turning wheel.

In the morning I'm going to deinflate one of mine ,then put on the ignition. If I get no warning, it's a learning curve on Audi for me.

Edited May 6May 6 by Audisq524

Even the active with live pressure levels takes a few seconds of movement, well at least the version I had on the last car, a VW Tiguan, did. The sensors in the wheel go to sleep when not moving to save battery. They kicked in after around 100m unless it was very cold