DTC P0502: Vehicle Speed Sensor Low Output: Notes
WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Vehicle Speed Sensor (VSS) may also be referred to as Output Shaft Speed (OSS) sensor.