I bought a 2002 9-5 saab from auction, but it doent have the key, what do i do to get key that will work with the security module in the car????

Should it still start after bypassing the lock and using the igntion control module with a screwdriver?
Your best bet take it to a qualified repair shop !

The theft prevention electronics can cause it, The engine control module can cause it, the ignition control module can also cause it.

No you can't. You can bypass a key or module, But the ECM still needs a signal to start and run the car.

It is not reading the security chip. Something was set up wrong to keep it from recognizing or they don't match.

It surely does. If you got the key,switch, and module fro one car. Go back and get the engine control module. This will work also. But beware. The engine module must fit you engine and transmission. Also beware. Some security modules are one time only program. Meaning, you have to buy a new one and have it programmed.

The A/C control module is bad.

When this type of a problem occurs you must have the electronic engine control module scanned for fault code before any other work is done, it is step one.

Hi,
The TCM on the 9-5 Aero is located behind the glove compartment.
Remove the under panel on the passenger side, and look up behind the glove compartment - the TCM is clipped onto the bulkhead.
Please remember to dicobbect the battery BEFORE removing the module.
Total time to replace the module - 10 mins!
Good luck

I suspect you have a problem in the security system receiver module, which in most cars must be programmed by the dealer.

Hello,If you have a genune SAAB key/remote and immobilizer and you have activated the alarm then you can simply deactivate it only with the same key/remote.