Why does my VSS have a low voltage input?
A low voltage input condition may be caused by either an electrical or mechanical problem. A typical VSS or vehicle speed sensor: Related vehicle speed sensor trouble codes: P0501 Vehicle Speed Sensor “A” Range/Performance P0503 Vehicle Speed Sensor “A” Intermittent/Erratic/High
What happens if the VSS sensor is not working?
Vehicle speed information relayed by the VSS is used by the transmission control module (TCM) or powertrain control module (PCM) to determine shift timing. Therefore, a failing speed sensor will have a direct impact on automatic transmission operation.
What causes a low voltage on a speed sensor?
A low voltage input condition may be caused by either an electrical or mechanical problem. A typical VSS or vehicle speed sensor: Related vehicle speed sensor trouble codes: P0500 Vehicle Speed Sensor “A” Malfunction
How is the VSS sensor used in the PCM?
OPERATION The Vehicle Speed (VSS) Sensor input is used by the PCM to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed. The PCM has a base frequency stored in memory for a distance of one mile.
Vehicle speed information relayed by the VSS is used by the transmission control module (TCM) or powertrain control module (PCM) to determine shift timing. Therefore, a failing speed sensor will have a direct impact on automatic transmission operation.
What does it mean when your speed sensor stops working?
Learn more… A vehicle speed sensor, or VSS, is a sensor that is used to determine how fast your vehicle is traveling. If your vehicle’s speedometer stops working or isn’t telling you the correct speed that you’re traveling, you likely have a faulty VSS.
Is it possible to operate a car without a speed sensor?
While it’s technically possible to operate your vehicle without a properly functioning vehicle speed sensor, it is strongly discouraged. A faulty VSS can negatively impact multiple aspects of vehicle operation—which is why it’s best to replace a bad speed sensor as soon as possible.
Where are the speed sensors on a car?
The VSS is connected to a speedometer cable and positioned between the axle and the wheel of a vehicle. The most common types of VSS operate from a magnet connected at the back of the transmission housing behind the speedometer. The top of the VSS senses the output of the transmission.