B1601 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1601 – PATS Received Incorrect Key-Code From Ignition Key Transponder
B1601 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light),Engine no start situation
B1601 Possible Causes
Faulty Passive Anti-Theft System (PATS) key,Faulty Powertrain Control Module (PCM)
During each vehicle start sequence, the transceiver reads the Passive Anti-Theft System (PATS) key identification code and circuit send the data to the Powertrain Control Module (PCM).