billsfan

So I'm driving on the highway yesterday and an alarm goes off saying something to the effect of "Loss of pressure detected. Check pressure and update values in MMI." Thinking that I had a flat tire I get off the next exit and check all the tires. No flats (I have run flats anyway) but pressure was around 29.

Has this happened to anyone? If this was just Audi's way of alerting drivers to low pressure, they need to find another. The alarm was startling and I was almost late for my meeting. The alarm is LOUD and implies an emergency.

Cadx6

Did you have a significant temperature drop the night before? The system we have doesn't detect an actual leak - it just detects a change in one or all of the tire's pressure that was set in the MMI.
This time of year TPMS systems in areas that have actual change of seasons tend to go berserk as temperatures drop causing tire pressures to drop - particularly after sitting overnight.

billsfan

Yes, in the 30s. I was on the road for a good 30 mins before it sounded.

Cadx6

At least we know "the system works" - although somewhat at the expense of your nerves

BigKutta

Sounds like the pressures dropped due to the temp. Just inflate to the right pressures and reset in MMI

MDIZL

Yes, I too was at 30 psi when i got the alarm. Kind of sad that if one tire looses pressure, the Q7 won't tell you which tire it is.

ConservativeConsumer

What is to be sad about? The OEM HUF sensors from previous years VAG were about $90 a pop. I'd rather have a warning once in a while telling me that the tire is at less than 3 PSI when was calibrated last time. Check you tire air pressure regularly and run calibration right after. And that's all.

discogone

I have had it happened twice since I purchased the Q7. The first time was real, a screw was found on one of the tires. The second time was a false alarm.

sr007

If the alarm went off for all 4 tires, clearly the low temp appears to have triggered it. Has happened to me in the past on my BMW.