WELL I HAD THE SAME PROB. ON A 95 CHEVY CAPRICE.I REMOVED THE IGNITION AND THE WIRE WAS BROKE.WHEN U TURN THE KEY THE PASS KEY WIRE TURNS WITH THE IGNITION,WHAT A FAULTY DESIGN.ANY HOW BUY A NEW IGNITION AND KEY THAT SHOULD SOLVE THE PROB. GOOD LUCK
This worked on 95 caprice. Pass key fault light. Tried to start and pass key fault light came on. Well I got an idea to put in the key and remove it 3 times. The pass key fault light when out and car started.
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If it's the same as the VATS system in my 86 Corvette (resistor pellet in key) the ignition switch might need to be replaced. The contacts on the key wore low, replacing the key helped for a short time but the new contacts wore the switch down faster then it too needed to be replaced. $200!
your resistor chip on your VATS key make look fine but there are also contacts just inside your key way on your ignition that work with your key to make the connection to the cars computer allowing it to read the resistors value and if it matches, allows to car to start, if it does not make proper contact some time, it will not read the key and car will not start, probably you need to have the ignition replaced.......
Put the key in turn it on don't start it wait 10mins turn the key off remove it waits 10 seconds repeat this 3 times this should help if not try this with another key if it still don't work your ignition switch ifs probably bad dealer must replace and reprogram new keys. I got this info from the emission wiz it helped me on 2 different cars
I have a 96 Caprice and this has happened to me twice now. There are two wires that are behind the ignition (where the key goes) one or both of the wires have more thsn likely broken. I was told that the little chip in the key may have been bad so I had a new key made, didn't solve the problem!! Come to find out there was a guy in my area that rebuilds steering colums and ingnitions when there's a problem or someone tried to steal the vehicle. So I live in Dayton, Ohio hopefully your in the area probably not but try to find someone who works on cars in your area and have them take your ingnition out, and i'm about 90% sure that that is your problem. Hope it works for you. Kevin