Ignition Key-In Circuit Failure
The key-in-ignition warning circuit has a fault.
Informational only. Consult a qualified mechanic.
- Faulty ignition switch sensor
- Key reminder switch worn
- Wiring issue
Replace the ignition key sensor if the warning is annoying.
What does B1352 mean?
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.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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