DTC P0608: Vehicle Speed Sensor Output Circuit Malfunction: Description

Powertrain Control Module (PCM) creates vehicle speed output signal by rapidly grounding Vehicle Speed Sensor (VSS) through an internal switch known as a driver. Each driver has a fault line which PCM monitors. When PCM commands a module ON, voltage of control circuit should be low (near zero volts). When PCM commands a module OFF, voltage of control circuit should be high (near battery voltage).