2002 Ford F150 Bi-fuel Supplement 1st Printing - Page 15

Instrumentation and controls WARNING LIGHTS With the engine running, the "Check Engine/Service Engine Soon" indicator light (depending upon application) will illuminate on the instrument cluster when the On Board Diagnostics System and/or the Gaseous Fuel Injection System detects a malfunction in one of the engine's emission controls. For more information, refer to Warning light and chimes in the Instrumentation chapter of your Owner's Guide and this supplement. If a malfunction of the Gaseous Fuel Injection System is detected with the engine running in the gaseous ALT fuel mode, the green indicator light on the fuel selector switch will flash GAS on and off. The warning lights may illuminate or flash on and off (depending upon application) without a driveability concern being noted. The vehicle will usually be drivable and will not require towing. Contact a qualified Ford dealership at the first available opportunity. 15