My 2012 Camry SE has recently began to have tire pressure warnings. I took the vehicle to the dealer where I purchased it and was assured that it was only the change in temperature that was causing the warning light to come on. The dealer adjusted the tire pressures and released the vehicle. The next day the problem returned indicating that a different tire was the cause (a different icon on the display). I returned to the dealer and was again insured that it was only the change in temperature that was causing the warning light to come on. This time the dealer adjusted the tire pressures over the recommended pressures to try to compensate for the temperature changes, being in southern California I felt this was not a very valid assessment but left it to the dealer to adjust the tire pressures again. One week went by and again the warning light was on and again a third icon was illuminated and the warning light was on. I returned to the dealer and they took the car into the service bay. The tech told me that indeed one tire was low and that he had removed the tire, checked it completely by dunking it in a water tank but could not find any air leaking. The dealer adjusted the tire pressure for the third time and increased the air pressure even more than the last time. So after three trips to the dealer they insured me that nothing was wrong with the sensing system, the temperature change must be causing the warning light, one tire was leak tested with no leak results and I was sent home again with the tires inflated 3 to 4 psi over the recommended manufacturers setting. I was told that if it happened again to bring it back and they would need the car for the day to try to figure out what the issue is with the vehicle. I drive around worried about getting a flat or a tire or wheel failing while I'm driving. The tires are Michelin primacy mxv4 P215-55-R17 on alloy rims.

- Chula Vista, CA, USA