B1600 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1600 – PATS Ignition Key Transponder Signal Is Not Received

 

B1600 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1600 Possible Causes

 

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

 

B1600 Description

 

The Passive Anti-Theft System (PATS) transceiver communicates with the PATS key. During each vehicle start sequence, the PATS transceiver reads the pats key identification code and sends the data to the instrument cluster. The control functions are contained in the instrument cluster. The instrument cluster carries out all of the PATS functions such as receiving the identification code from the PATS key and sending a message to the Powertrain Control Module (PCM), which controls the engine enable. The instrument cluster initiates the key interrogation sequence when the key is turned to the ON or Start position.