Code Definition

B1608 — Illuminated Entry Input Open Circuit

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B1608

B1608 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1608 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1608 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The B1608 code indicates that the Body Control Module (BCM), which on many Ford applications is referred to as the Generic Electronic Module (GEM), has detected an open circuit on the illuminated entry input. The illuminated entry input is the signal line the module monitors to decide when to switch on the interior courtesy and dome lamps, and it is fed by the door ajar switches, the courtesy lamp control, and on most models the remote keyless entry receiver. Unlike the more general B1607 (any failure mode), B1608 is specific to a loss of continuity, meaning the input never sees the expected l...

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