DTC P0502: Problem in Vehicle Speed Sensor Circuit (No Signal Input): General Description

The vehicle speed sensor (VSS) is attached to the transmission housing. The VSS outputs a pulsing signal for every revolution of the differential gear via the speedometer gear. The engine control module (ECM) receives the signal and determines the vehicle speed. If there are signal dropouts, the ECM detects a malfunction that may be caused by an open, a temporary open, or a short to ground. When the speed measured by the CVT speed sensor is a specified value or more, and the speed measured by the VSS is at a set value or less, and this condition continues for a set time or more, a malfunction is detected and a DTC is stored.