The tire pressure sensor in the front left tire is not working.
Many tire pressure sensors that are located inside the vehicle tire assembly have a built in battery that does fail over time. Once the sensor does fail, it should be replaced with a new one. For tire pressure sensor assemlies that have an aluminum lock nut, this is a good time to replace the lock nut and seals on the other sensors or replace them all at the same time.
Have a car question? Get free advice from our top-rated mechanics.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%