B1681 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1681 – PATS Transceiver Module Signal Is Not Received

 

B1681 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1681 Possible Causes

 

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

 

B1681 Description

 

During each vehicle start sequence, the transceiver module reads the Passive Anti-Theft System (PATS) key identification code and sends the data to the Powertrain Control Module (PCM).