Like all cars today, Ford uses on-board diagnostics to help identify faults in car performance. Some of the codes are generic and common to all cars; others are codes specific to Ford's use for its models and engine designs. Fault code P0320 is one of these messages.
On-board diagnostics II, also known as OBD-II, is the data language used by car computers to signal when a problem is occurring in the car's performance. The data is pulled from the car by using an OBD-II scanner/reader tool. Repairs are then made, consistent with the code readings.
P0320 is a code signifying an Ignition/Distributor Engine Speed Input circuit fault. This code reflects the data measured tracking the engine ignition timing. If the engine timing is off, the code will be sent by the ignition sensors to the car's computer as a warning. This in turn will trigger the check-engine light and a code specifying repair is needed.
Mechanics using code P0320 as a signal on a Ford car will look to see that the connection and wiring on the related sensors are working properly. The signal can be sent by loose wires as well as bad ignition. A mechanic will also check the spark plugs and ignition coil for any flaws as well.
