Part of the generic B2B18 overview — this page covers the Ford meaning specifically.
OBD-II Diagnostic Trouble Code
B2B18
Ambient Light Switch Input Fault
B
Body
comfort / safety
comfort / safety
2
Generic
SAE standard
SAE standard
B
Body subsystem
18
Ambient Light Switch Input Fault
Severity · general guide
Varies
Body/safety — depends on system
Code type
Ford
System
Body
Model
F-150
Years
2011