[Bill33525]

The E-Tron tire pressure monitoring feature does not display the current pressure in the tires. Seems like a missing detail in the feature?

 

[GMTRB5]

I agree - it’s strange isn’t it - they don’t have full TPMS - they use a system that measures the pressure when you’re driving to assess whether they are under inflated or not ...

 

[ioannisk]

Agreed. Full TPMS has been available for a while now, so it's strange we don't have that in a vehicle this expensive and this advanced. However, I may have an explanation: It seems that full TPMS does not play well with Wireless CarPlay. I have this combination in a 2020 vehicle, and the TPMS occasionally throws errors ("unable to read sensors") when Wireless CarPlay is active. It seems that the frequency used by the TPMS base station to communicate with the wireless sensors in the tires is right smack in the middle of the WiFi frequency range. Whenever this happens, the trick is to disable CarPlay and then re-enable it; then the WiFi access point sees the TPMS signals and selects a different channel. I would like to believe that Audi saw this and decided not to implement TPMS until the problem is resolved. Unfortunately, the truth is probably different.

 

[bradhinkle]

Agree. Not showing individual tire pressures is pretty much unacceptable in a car that is in this price range. Maybe the car's wireless Car Play system prevents a TPMS system from working properly. The eTron also does not have AM radio. Which was a surprise to us because we had no idea that any car wouldn't have AM radio when we ordered the eTron. But maybe the lack of AM radio also indicates the reason why a full TPMS showing individual tire pressures is not available for the eTron.

 

[Carsplain]

The 2019 X5 we traded for this e-tron had both wireless CarPlay and could show individual tire pressures. Pretty big miss here.

 

[Joe]

The 2019 X5 we traded for this e-tron had both wireless CarPlay and could show individual tire pressures. Pretty big miss here.

Strange. My 2019 etron has wireless CarPlay.

 

[Carsplain]

Strange. My 2019 etron has wireless CarPlay.

Yes, as does ours, I'm speaking to the lack of showing each individual tire pressure. Posts above indicated that showing tire pressures wasn't possible due to wireless CarPlay. Our 2019 X5 had both with no issues.

 

[TJL]

I looked for the TPM display in our 2019 e-Tron. The message came back telling me that I had to do the initial measurements on each tire. I took that to mean that after I did my measuring chore, and entered the data, the e-tron would subsequently show the real time pressures.....I've yet to do my part....

 

[Steviestainz]

I think that you have to set the pressure correctly for the load, temperature and tyre type then register that as a baseline. The car must then look for a deviation in rotational speed against power delivered to the wheel in order to detect if the tyre is going flat. Perhaps this is an adequate solution? Not so sure it’s very useful to know the exact pressure figure but I’ve never owned a car with that feature.

 

[TJL]

We had TPM back in 2010 on our Honda, and still do on our pick-up. Perhaps because we live out on a dirt road, our tires require more maintenance, we've found that information very helpful , especially if you can inflate at home, and totally avoid gas stations .

 

[Carsplain]

I think that you have to set the pressure correctly for the load, temperature and tyre type then register that as a baseline. The car must then look for a deviation in rotational speed against power delivered to the wheel in order to detect if the tyre is going flat. Perhaps this is an adequate solution? Not so sure it’s very useful to know the exact pressure figure but I’ve never owned a car with that feature.

Maybe someone who's had a warning can chime in here. Let's say one tire does go low, does the car tell you which tire?

As @TJL noted, this is nowhere near new technology.

There ARE cars that have wireless CarPlay AND can still provide specific tire pressure readouts, so I don't really buy that as an excuse for this brand new vehicle to lack this combination of features.

I definitely find it very helpful when I know exactly which tire might be running a little low. Or maybe all 4 have dropped significantly.

 

[azlkk]

They cheaped out by using the ABS sensors in place of actual telemetry. But it actually works in cases other than weather changes. I had to nurse a similar car back home over 600-odd miles and it would typically flag a 4-5 psig drop.

 

[azlkk]

Maybe someone who's had a warning can chime in here. Let's say one tire does go low, does the car tell you which tire?

No it won't just, that a tire is low.

A curious thing about my old 2015 Volvo XC60 is that it had actual sensors but it still wouldn't tell me which tire was low and how low it was. The wife's car tells me individual tire pressures and temperatures, as do many after-market TPM systems.

 

[calbear92]

You can activate AM radio on eTron using OBD Eleven app for 10 credits for that app.

 

[RBW]

I think that you have to set the pressure correctly for the load, temperature and tyre type then register that as a baseline. The car must then look for a deviation in rotational speed against power delivered to the wheel in order to detect if the tyre is going flat. Perhaps this is an adequate solution? Not so sure it’s very useful to know the exact pressure figure but I’ve never owned a car with that feature.

I always fit Tyre pal pressure sensors to my cars. These give a constant pressure and temperature reading. Unlike the early tyre pressure monitoring systems which required a pressure sensor within the tyre these simply fit externally to the valve. They are very accurate too!