CARWATCH
Code B2104
Door Passenger Key Cylinder Switch Failure
What does code B2104 mean?
If scanning your vehicle resulted in the B2104 code, it means the OBD2 system logged a fault related to: "Door Passenger Key Cylinder Switch Failure".
Being a standardized error, it affects all OBD-II compliant vehicles. However, the precise diagnosis, the location of the faulty sensor, and the cost of parts will vary depending on the exact model of your car.
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The easiest way to read engine data and fix this alert is by using a Bluetooth OBD2 reader directly from your smartphone.
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