X.X MPG INST

IMPORTANT: This calculation may not be reset by the driver. The data used in order to calculate the IFE parameter is lost if a battery disconnect occurs. The message contains dashes if the IPC is unable to communicate with the RIM or PCM via the class 2 serial data line.

This message shows the instantaneous fuel economy in miles per gallon (MPG) or liters per 100 kilometers (L/100 km).

Instant Fuel Economy calculation display is based on the previous few seconds of vehicle operation. The IPC uses the following formula in order to calculate the Instantaneous Fuel Economy (IFE) parameter:
(IFE) = (Distance) / (Fuel Used) x (Scale Factor).

The distance is determined from the discrete vehicle speed input to the IPC and the fuel data is received from the RIM.