B1601: PATS Received Incorrect Key-Code From Ignition Key Transponder
MediumBodySecurity & Immobiliser
What does B1601 mean?
B1601 is a diagnostic trouble code indicating "PATS Received Incorrect Key-Code From Ignition Key Transponder". This code relates to your vehicle's security & immobiliser and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Faulty security & immobiliser component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code B1601 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.