Dodge 2013 Charger-SRT - Owner Manual - Manual (Page 268)

FCW Unavailable Warning
If the system turns off, and the EVIC displays “ACC/
FCW Unavailable, Service Required”, there may be a
temporary malfunction that limits FCW functionality.
Although the vehicle is still drivable under normal
conditions, FCW will be temporarily unavailable. If this
occurs, try activating FCW again later, following a key
cycle. If the problem persists, see your authorized dealer.
ACC/FCW Unavailable, Service Required Warning
266 UNDERSTANDING THE FEATURES OF YOUR VEHICLE