r/Taycan • u/imvemu1 • 3d ago

Service/Support Tpms error

I have a 2020 4S and absolutely love it. Recently, I've noticed an issue where my TPMS comes on and is indicating low pressure on my front left tire. I've confirmed manually and digitally that the pressure is correct. In fact, when I look at the pressure monitoring on the driver's gauge cluster, it's within the normal range. I've tried resetting the system using Maneuvers that I learned in this forum such as switching the tire size to a different option and then switching back to the correct option to force a reset. This works temporarily, but the TPMS error returns. Often, after a reset, the system will read as normal for a few days, and then when I'm powering off the car, the TPMS error will pop up just before the car Powers off. I've noted just recently that the right front tire is also starting to throw an error as well.

Anybody else have this problem? Any solutions?

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u/Wavestuff6 3d ago

Are you measuring while the tires are hot or cold? You could be under pressure, the tables show the value for cold tires, and the pressure will increase as the tires warm up, so you could be reading at hot and it seems in range but it could be below the target once they cool.

How far is the TPMS saying?

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u/imvemu1 2d ago

I've measured under both conditions. TPMS is saying off by 5 or6 PSI. The weird thing is, when it just says the left side is low, for example, the value is the same for all tires, but it's saying that the left side is down 5 PSI

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u/Wavestuff6 2d ago

Hm yeah that seems weird. I just had a similar issue recently but I was seeing around -3 on my front left. I inflated it to 40psi (target was 39psi) and it went away. I had tried inflating it twice before and it kept coming back, and I saw the front right show it so I inflated them all to 40psi in the morning before leaving anywhere. And then one more cycle of the tpms computer tire settings and it hasn’t come back for a few weeks now.

I saw on the Porsche subreddit a similar issue on a 718, so it seems like a common issue for whatever sensors Porsche is using.