VATS is really only specific to the systems that have chip keys.

You have a security issue I'd say. A noid would help a lot like said above. Sensors rarely gay out like this. Something else is wrong. Remember, there are more modules and "thinking" involved on the security system than just the PCM. Someone's not happy here and I'll bet it's the BCM, etc. 'cause I bet you can't read body codes, eh?