DTC P0502: VSS Circuit - Low Input (A/T): Description

Output Speed Sensor (OSS) produces an AC voltage of different amplitude and frequency depending on the velocity of the output shaft. OSS produces signal from 16 evenly spaced machined notches on transaxle final drive assembly. OSS produces a readable AC voltage signal when speed is more than 3 MPH. OSS signal is sent to PCM, which is used to determine vehicle speed. DTC sets when PCM does not detect an OSS signal for a certain length of time.