Celica Tire Pressure Warning

I had something similar happen with my Opel Astra. Tire pressure light was on even after I checked the pressure. Did you check the spare tire's pressure? My spare had a faulty sensor that triggered the warning.

Thanks! I appreciate the spare tire suggestion. But my Celica doesn't have a sensor in the spare. Any other ideas what could cause the error?

Gotcha. If your spare doesn't have a sensor, it's probably one of the main tire sensors failing. Usually, that means the sensor battery is dead. I'd take it to a shop to diagnose and replace the bad sensor. That's probably the quickest fix.

Thanks for the advice! I took it to a shop, and you were right, it was a dead sensor battery in one of the tires. Replaced the sensor, and the error's gone. Cost me 280€, but it's fixed!