Vehicle Speed Sensor (VSS)

DESCRIPTION
The vehicle speed sensor (VSS) (model-dependent) is a variable reluctance sensor that sends an AC/frequency signal to the powertrain control module. The vehicle speed sensor signal is used by the powertrain control module to calculate vehicle speed in mph and determine shift scheduling and electronic pressure control.

SYMPTOMS
Harsh engagements, firm shift feel, abnormal shift schedule; unexpected downshifts can occur at closed throttle, abnormal torque converter clutch operation or torque converter clutch engages only at wide-open throttle. May flash transmission control indicator lamp.

DIAGNOSTIC TROUBLE CODES
P0500, P1500, P0503