Step #3 – Remove your faulty speed sensor. Removing the front speed sensor. If you're looking to replace your front speed sensor, you can do so by following these steps: Make sure that your battery is disconnected before starting this process. Next, use a socket wrench to loosen and remove your car's negative cable from its terminal post. The Speed Sensor is a device that measures how fast the vehicle moves, and sends this signal to the ECU automotive computer. The ECU uses this signal to calculate the exact time the automatic transmission should change gear. It also calculates fuel injection time, and ignition time. The VSS Speed Sensor is also fundamental for the correct A speed sensor does not only indicate the vehicle speed but also helps with cruise control operation and regulation of the fuel’s flowing and ignition timing. A speedometer may stop working due to a bad sensor. Plus, the affected cruise control can disrupt the driving functions of the car. Any problem with the sensor will make the Check Vehicle Speed Sensor (VSS) On vehicles equipped with 4-wheel anti-lock brake systems (4WABS), the vehicle speed signal is generated by the rear anti-lock brake sensor and sent to the 4WABS module. The 4WABS module sends the vehicle speed signal via circuit 679 (GY/BK) to all systems that require a vehicle speed signal input. The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more. The 2019 Ram 1500 has 33 NHTSA complaints for the vehicle speed control at 7,533 miles average. To illustrate the basic concept, hydraulic pressure from the governor pushes the 1-2 shift valve from 1st gear to the 2nd gear ratio as vehicle speed increases. In contrast, opening the throttle will increase throttle valve (TV) oil pressure on the opposing side of the shift valve, which then forces the 1-2 shift valve back to the 1st gear ratio. .

vehicle speed sensor problems