What would trigger a PCM code P1626 Theft deterant fuel enable?

 

Circuit Description

The body control module (BCM) produces the theft deterrent crank relay and fuel enable signal when ignition is ON and the proper ignition code voltage value is detected. The powertrain control module (PCM) monitors the fuel enable signal during crank. If the proper signal is present on the Class 2 Serial Data Circuit, the PCM enables the fuel delivery in order to allow the engine to start. If the PCM determines that the fuel enable signal is not present or incorrect while the engine is running, DTC P1626 is set. The engine continues to start and run as long as DTC P1626 is stored. If the problem affects inputs to the VTD signal, the starter motor may be disabled.
Conditions for Running the DTC

The engine is running.
Conditions for Setting the DTC

The PCM has detected a loss of the state of health serial data message from the theft deterrent system.
Action Taken When the DTC Sets

* The body control module (BCM) send a class to message to the instrument panel cluster (IPC) to illuminate the SECURITY indicator.
* The powertrain control module (PCM) will not illuminate the malfunction indicator lamp (MIL).
* The PCM will store conditions which were present when the DTC set as failure records data only. This information will not be stored as freeze frame data.

Conditions for Clearing the DTC

* A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
* The DTC can be cleared by using a scan tool.

 

Thanks. I had a condition last week where the car started and died immedietly then restarted without a hitch. Got loss of COM with most moduels? Also had 2x Voltage low charge fault message I think the voltage regulator maybe on the way out.