DTC P0500 - Vehicle Speed Sensor (VSS) Malfunction: Condition

WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when vehicle speed signal is less than .9 MPH for more than 33 second while driving vehicle with engine speed is greater than 1810 RPM . Possible causes are:

Speedometer sensor malfunction.
Open or short between ignition switch and instrument cluster.
Open or short circuit between ground and speedometer.
Open or short circuit between VSS and speedometer sensor.
Open or short circuit between VSS and terminal No. 1C on Engine Control Module (ECM).