S90 tire pressure sensor fault

I have an S90 as well, and I had a similar issue. Did you check the tire pressure manually to rule out an actual low tire situation before assuming it's a sensor malfunction?

Yes, I performed a manual tire check and confirmed the pressure is within the recommended range. All tires are properly inflated. That's why I'm leaning towards a sensor problem. Was your issue also triggered by correctly inflated tires?

Affirmative, my S90 exhibited the same behavior – correct tire pressure but persistent TPMS warnings. It turned out to be a failing sensor. I recommend a visit to a reputable workshop for diagnosis and potential sensor replacement. The battery life on those sensors isn't infinite.

Thank you for confirming my suspicions. I appreciate the insight. I took it to the workshop as suggested, and it turned out that the tire pressure sensor battery was indeed empty. The repair cost was 280€, including sensor replacement and programming.