DESCRIPTION:Vehicle speed sensor circuit failed low. MONITORED PARAMETER:Vehicle Speed Sensor (VSS). TYPICAL ENABLING CONDITIONS:Always Enabled MONITOR SEQUENCE:None EXECUTION FREQUENCY:Always Enabled TYPICAL DURATION:2 seconds DASH LAMPS:MIL ENGINE REACTION:None VERIFICATION:Engine Idle (1 minute). PROBABLE CAUSES:1. Vehicle speed sensor.2. Wiring between vehicle speed sensor and ECM.

DESCRIPTION:Vehicle speed sensor circuit failed low. MONITORED PARAMETER:Vehicle Speed Sensor (VSS). TYPICAL ENABLING CONDITIONS:Always Enabled MONITOR SEQUENCE:None EXECUTION FREQUENCY:Always Enabled TYPICAL DURATION:2 seconds DASH LAMPS:MIL ENGINE REACTION:None VERIFICATION:Engine Idle (1 minute). PROBABLE CAUSES:1. Vehicle speed sensor.2. Wiring between vehicle speed sensor and ECM.

NOTE: This SPN is broadcast to the Motor Control Module (MCM) via the Common Powertrain Controller (CPC). POSSIBLE CAUSES:Faulty wiring.

NOTE: This SPN is broadcast to the motor control module (MCM) via the common powertrain controller (CPC). PROBABLE CAUSES:1. Vehicle speed sensor.2. Wiring between vehicle speed sensor and ECM.

NOTE: Front axle speed signal is missing. NOTE: If codes 168-0, 168-14, or 168-18 active fix those first. PROBABLE CAUSE:1. CPC has improper programming.2. There is another computer on the vehicle (ABS, Transmission, Cab, etc…) that is causing the problems.