ks7

My tire pressure warning light on my 2012 A4 keeps coming on asking me to check the pressure on all 4 tires. I've checked the tire pressure and they are fine. I've reset it in the using the computer/MMI and it still keeps going off. Is there a way to turn it off? I have heard the labor to replace a sensor is $350-$400.

uberwgn

KS, no in-wheel sensors on a 2014 A4 sold in the USA.

Do you have access to the VCDS tool for a quik scan?

ks7

I am unfamiliar with the VCDS tool kit.

If there isn't an in-wheel sensor what is causing the warning to repeatedly go off?

uberwgn

Well, that's what a VCDS scan could potentially reveal.

Can you track down your local VCDS person and see if they could assist you with a quick scan?

SMac770

Since the start of the decade, VW and Audi moved nearly all their lineup from direct TPMS to indirect TPMS. So there's no sensor actually measuring the tire pressure and temperature. It uses the wheel speed sensors of the ABS system to gauge if a tire is rolling at a different rate than expected. That alone makes for an inaccurate system. So these gen 2 indirect TPMS systems that were developed to meet US requirements use a lot of analytics on the frequencies of those speed sensor signaling rates.

So your car never knows if your pressure is high or low. It's only guessing that things seem different than the baseline you said was "normal" when you reset your TPMS. Keep in mind, that can take up to an hour of driving for the system to establish that baseline.

I don't have an indirect TPMS vehicle, mine is a 2009. So not sure if you can verify the state of the reset learning, or what else it can present. Audi, always holding back on the owner, doesn't display the temp or pressure for tires in my car even though the car knows the values. But I can see the values in VCDS if I plug that up.

Most likely, it's not completing the relearn or you have something about one of the tires that's making out of norm vibration. VW at least would have tried to point out which tire seemed off (when you first start the car), does Audi even give you that?

IdahoJOAT

Mine does. Just yesterday it came on and it says it's the passenger rear tire, but the pressure is fine.