What's the matter with the tire pressure warning light on the 2021 Camry?
3 Answers
21 Camry tire pressure warning reasons are as follows: Tire puncture: This situation usually causes very slow air leakage, making it difficult to immediately identify which tire is affected. At this time, you can use a tire pressure gauge to measure. The front tires should be 2.3 bar, and the rear tires 2.5 bar. If any tire is underinflated, inflate it to the proper level and then observe the tire pressure warning light. Excessive tire pressure: According to the international GBT2978-2008 standard, the inflation pressure of car tires should meet the requirements in Tables 1-15: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar. Therefore, when any tire exceeds 3.0 bar, it will trigger the tire pressure monitoring light to turn on. Long-term lack of inflation: When the tire pressure drops below 1.8 bar, it will cause the tire pressure monitoring light to turn on. Therefore, regular checks should be performed to ensure the tire pressure monitor is functioning properly. If the car experiences issues and the tire pressure monitor does not alert in time, it indicates a problem with the tire pressure monitor.
I encountered the same situation last year when the alarm went off right after starting the car on a freezing cold day. I went to the auto repair shop and found the left front tire had only 1.9 bar while the others were normal. The mechanic said tire pressure naturally drops in cold weather and topping it up to 2.5 bar would fix it. The reset button is located below the left side of the steering wheel—just press and hold it for three seconds until you hear a beep to reset it. It's good practice to check tire pressure monthly with a gauge, especially before highway trips. Keeping a portable air compressor in the car is handy; I bought a dual-cylinder one that can fully inflate a tire in two minutes. If the alarm keeps going off, check the sensor—it might need a battery replacement, which costs around 200-300 yuan for a new sensor.
With over a decade of experience in auto repair, I've handled hundreds of tire pressure warnings, 80% of which were caused by insufficient tire pressure. Common scenarios include slow leaks from nail punctures or seasonal temperature changes affecting tire pressure. First, pull over to a safe location and inspect the tires—if visibly flat, don't drive further. The 2021 Camry features a direct TPMS system with sensors inside each wheel that display actual pressure values. If dashes appear instead of numbers on the dashboard, it indicates sensor signal loss, likely due to dead batteries or wiring issues. Our shop recently replaced two sensor batteries, as they typically last about seven years. After tire repairs, always reset the system. If the TPMS light stays on, visit a professional shop with diagnostic tools to clear the fault codes.
