Hybrid Electronic Cluster Self-Diagnostics Modes: "ALtF"
WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Displays 8-bit hexadecimal value for alternate fuel level. Shows -- if message not received and FF if message invalid. SeeINSTRUMENT PANELS - ANALOG - F150 - BI-FUEL or INSTRUMENT PANELS - ANALOG - F150 - CNG .