B1602 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1602 – PATS Received Invalid Format Of Key-Code From Ignition Key Transponder


B1602 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1602 Possible Causes


Faulty Passive Anti-Theft System (PATS) key,Faulty Powertrain Control Module (PCM)


B1602 Description


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).