Lamp Fault Codes (LFCs)
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The following lamp fault code (LFC) indicates the specific fault associated with diagnostic trouble code (DTC) B1921:
LFC DESCRIPTION
| LFC | Description |
|---|---|
| 1-4 | Air Bag Diagnostic Monitor Ground Circuit Open |
WARNING:
The tightening torque of the restraints control module (RCM) retaining bolts is critical for correct air bag supplemental restraint system (SRS) operation. Refer to RESTRAINTS CONTROL MODULE (RCM) in this article for correct torque values.
NOTE:
A resistance difference as low as 10 ohms may set the LFC.
NOTE:
The secondary warning chime will be activated along with the primary warning indicator when a fault is detected.