Pontiac Problems? Ask a Mechanic for Answers ASAP
Hi Toni, I'm Clay a certified master automobile technician with 30 years of automotive repair and diagnostic experience.
From your description it doesn't sound like a security problem because the vehicle does finally start and run after you disconnect and reconnect the battery. What are the specific codes you're clearing. With the P codes I can look into this problem more in depth.
Let me know what P codes are storing in the PCM.Thanks
Hi Toni,Thanks for getting back to me. I hate to use the "IF" word, but I don't know what all was done when the passlock sensor was installed, so I'll try and keep the "IF's" to a minimum. When you installed the passlock sensor a relearn procedure should have been performed to program the new passlock sensor to the Body Control Module (BCM) and the Powertrain Control Module (PCM). If this was not performed it could cause no start situations. The link below is a description of the passlock system and the procedure for replacing the Passlock Sensor, BCM and or the PCM. Not saying that the relearn procedure will solve all the vehicles problems but it could solve some of them or leave you in a not start situation.
Programming Theft Deterrent System Components
The headlight issues sound BCM related. If there's a problem with the BCM this would also cause the passlock system to forget the password ***** described in the programming procedure. The BCM can be monitored with a dealer level scan tool to determine if it's affecting the headlamps and or the security system. With a scan tool one can see the headlamp switch input in BCM data. If it is not changing as the lights are flashing, look at the ambient light sensors data and confirm it is stable. If it's stable check the BCM powers and grounds. If all checks good the BCM is defective. If there are any other problems with like the door locks and or the remote keyless entry systems these could also be BCM related problems.
I'm not sure if Advance will be able to scan the BCM, kind of depends on how much money the store manager has invested into stores shop tools.
I hope this information is helpful. Let me know what all you find out.
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