The key-in-ignition warning circuit has a fault.
Informational only. Consult a qualified mechanic.
Replace the ignition key sensor if the warning is annoying.
The B1352 OBD-II diagnostic trouble code (DTC) indicates: ignition key-in circuit failure. This is a low-severity body code that your vehicle's onboard diagnostics system triggers when the key-in-ignition warning circuit has a fault. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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