PATS Key Not Programmed
The vehicle immobilizer system does not recognize the key being used.
Informational only. Consult a qualified mechanic.
- Key not programmed to vehicle
- Faulty transponder in key
- PATS module failure
- Antenna ring issue
Have the key reprogrammed. May need dealer assistance.
What does B1601 mean?
The B1601 OBD-II diagnostic trouble code (DTC) indicates: pats key not programmed. This is a high-severity body code that your vehicle's onboard diagnostics system triggers when the vehicle immobilizer system does not recognize the key being used. 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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