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While driving to work one morning, you notice the code b10f1 pop up on your car's dashboard. Typically, these codes are just reminders for routine maintenance, but in this case, b10f1 specifically indicates a problem with the body control module sensing an unusual opening in the ignition switch input circuit. This likely means you'll need to have a new ignition lock cylinder installed, which can run you about $80 to $118 for the part alone. If you hire a mechanic or auto professional to do the installation, expect to pay an extra $100 to $210 for labor.
The b10f1 Ford diagnostic code is triggered when the Body Control Module (BCM) detects a break in the key-in-ignition switch connection.