I've had the flashing TPMS dash light since buying the 4Runner. I assumed it was a dead battery in the wheel sensor and just ignored the dash light.
Then I bought some new tires. After installation the shop owner spent about 20 minutes working in the driver's seat. I had no idea what was going on. When he finished he said that the TPMS sensor had probably been replaced in the past and that there were "multiple registrations" in the computer.
So the TPMS light was now off! I've never seen the dash with no lights illuminated
I pulled out of the shop and suddenly the vsc/trac lights light up
When I got home I did the zero point calibration, and now, for real, NO LIGHTS IN MY DASH
So if you're really good with OBD-2 you might be able to fix a flashing TPMS light like my tire guy did.
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2004 4Runner Limited, v8, 4WD
Overlanding Travel App for iPhone
"Great things are done when men and mountains meet." -William Blake