Faulty Vehicle speed sensor
Vehicle speed sensor harness is open or shorted
Vehicle speed sensor electrical circuit poor electrical connection
Faulty Wheel Speed Sensors
Wheel Speed Sensors harness is open or shorted
Wheel Speed Sensors electrical circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Indicates the Powertrain Control Module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the Vehicle Speed Sensor (VSS), Transfer Case Speed Sensor (TCSS) or Anti-lock Brake System (ABS) control module. The P1502 code sets the same way as P0500. However, it is intended to flash the Transmission Control Indicator Lamp (TCIL) for first time VSS circuit error.