Code Definition

B10F1 (14) — Key in Switch Circuit Short to Ground or Open

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

About B10F1

B10F1 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 B10F1 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; and a short-circuit (voltage pulled to ground or to supply) 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.

B10F1 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 Body Control Module (BCM) monitors the key in switch input circuit to detect whether a physical key is present in the ignition lock cylinder. The switch is a simple grounding contact inside the ignition lock housing that signals the BCM when the key is inserted or removed, supporting functions such as the key in chime reminder, the lockout that prevents the power door locks from arming while the key is in the ignition, and certain immobiliser and theft deterrent logic. DTC B10F1:14 is set when the BCM sees either a short to ground or an open circuit on the key in signal line under conditio...

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