engine speed sensor

Once you have purchased your Lexus, you will find there are a number of sensors and controls to get familiar with, but we are here to help! New cars on today’s market are computer engineered, but not all cars are equal. At Lexus, our goal is to make cars run as safely, smoothly and efficiently as possible. That’s our goal at the Earnhardt Lexus service department, too.

If you do see sensor lights and need your Lexus checked, we are here for your complete auto repair needs. Our expert technicians are ready to assist you with any questions you have regarding your luxury vehicle. 

How does the ABS work?

The antilock braking system (ABS) transformed the auto industry when it was introduced in the late 1970’s, making all vehicles much safer to drive. ABS uses hydraulic valves, a hydraulic pump and four wheel speed sensors. A controller checks the speed of each wheel using the sensors. The system prevents your brakes from locking by monitoring the deceleration of the wheels and using the hydraulic valve to decrease the brake pressure on the needed wheel allowing it to turn faster. When the wheel speeds up again, it uses the pump to put pressure into that wheel’s brake line. 

What is the VSC and how does it work?

Others call it electronic stability control, but vehicle stability control (VSC) is what is called by Toyota and Lexus. This technology was developed in the mid 1990’s by Toyota. It didn’t become a standard requirement in the U.S. until 2012. The VSC system also makes use of the wheel speed sensors as well as sensors for the yaw rate and steering angle. The system is assisted by a controller, an accelerometer, and a hydraulic modulator. When your sensors detect your car starting to skid, the VSC activates each wheels’ brakes and regulates your engine to regain control and stability of the vehicle. This system significantly reduces the possibility of an accident. 

What does Traction Control do for my car?

Your vehicle’s traction control (TRC) works in a very similar fashion to the VSC. The system is designed to prevent wheels spinning when driving off or accelerating on wet or slippery roads. Introduced in the late 1980’s, the TCS becomes more sophisticated each year as its technology is updated. The TRC Sensors monitor each wheel’s speed to detect wheel spin, alerting the system to apply the brakes or reduce engine power to regain grip and provide stable acceleration.  

All three systems, the ABS, VSC and TRC, work together to provide safety for you and your family on the road. It is important to pay attention to the corresponding sensor lights in your Lexus. When they are on, it means it's time to schedule repair or maintenance with our experts at Earnhardt Lexus Service. 


800 E Camelback Road, Phoenix, AZ 85014

Service & Parts: (833) 822-5593 | Hours