Lamp Fault Codes
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
When the restraints control module (RCM) detects a system fault, it will cause the air bag indicator to flash a coded sequence; a lamp fault code (LFC). The code is two digits. The first digit is flashed with a 0.5 second interval between pulses. There is a 2 second pause before the second digit is flashed which also has a 0.5 second interval between pulses. There is a 5 second pause between each display of an LFC.
The LFC is flashed three times after which the air bag indicator will remain illuminated for the remainder of the key-on cycle. If there are multiple LFCs, each code will be stored for retrieval by a diagnostic service tool, but only the highest priority LFC will flash.
Each LFC has one or more associated diagnostic trouble codes.