DTC P1631: Theft Deterrent Start Enable Signal Not Correct: Description

Theft deterrent control module produces theft deterrent fuel and starter enable signal when ignition is on and proper transponder key value is detected. The PCM monitors fuel and starter enable signal during crank. If proper signal is present on the class 2 serial data circuit, the PCM enables fuel delivery and starter operation in order to allow engine to start. If PCM detects an incorrect password, Vehicle Theft Deterrent (VTD) system failure or attempted vehicle theft, DTC P1631 is set. Engine will not start or crank as long as the condition is present.