Why does the security light keep coming on in my Saturn?

Answer 1

The Passlock security system is the problem. Should be recalled. The resistor workaround at the key isn't always the only problem. I tried it on my 99 Suburban and it didn't do any better with the resister bypass. You need to eliminate the entire security system. Buy the pro module for $179 plus shipping and save yourself the hassle of dealing with it ever again. Or you could go to the dealer and have them replace the entire system for over $1000. They will have to replace the key/tumbler/hall effect switch/wiring and EVO-Passlock module to get it right. Check out my profile page for a list of vehicles affected.

Previous answer:

Same problem on my 2002, took to the dealer and they said the car thinks it's being stolen because the ignition is going out. Ignition needs to be replaced at $385.00 plus tx. I only have 35,000 miles on this car, very rarely drive it. I am still checking to see if this is a known problem/recall from Saturn