P0503 2008 FORD FUSION - Vehicle Speed Sensor 'A' Intermittent
Faulty Vehicle Speed Sensor
Vehicle speed sensor harness or connectors is open or shorted
Vehicle speed sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)
When is the code detected?
The signal sent by the vehicle speed sensor to ECM is too high or intermittent.
Engine Light ON (or Service Engine Soon Warning Light)
Speedometer may not work properly
Transmission shifting problem
P0503 2008 Ford Fusion Description
Indicates poor or noisy VSS performance. Vehicle speed data is received from either the VSS, the transfer case speed sensor (TCSS), or the anti lock brake system (ABS) control module.