My 2004 saturn ion will not start an the passlock is not on an doesnt stay on i just replaced the battry an the ignition control module an the crank shaft postion sensor and it still will not start

After you disconnect the battery, you have to reset the security system. The immobilizer is stopping the car from starting.

https://www.google.com/search?q=2004+saturn+ion+security+reset

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You may need a locksmith to recode the passlock system.

probably on your alarm or checkon the crank sensor

Does the security light stay on ?
Your key may be worn down to the point where the ignition tumblers no longer hit the proper points.

Do you have normal compression, fuel pressure and spark ?

Hello Tricia,

The fix is unbelievably simple and NOT the ignition switch. It is however the pass lock white wire. The wire is located in the steering column. You can find a youtube video on it. You simply remove the airbag fuse (for safety), unscrew two screws under the steering wheel, you will see many wires. Find the wire wire (a guy has a complete instructional video on youtube), crank your Ion, cut the wire while it is cranked, seal the ends and replace everything. The only draw back is the passlock dashboard light will stay on. The passlock system is basically is someone steals your car without a key, it tells the computer to stop giving it gas. I had the same problem and since I cut the white wire it has cranked EVERY time. Good Luck, it will only cost you around 5 bucks...
Kelly

If the PassLock light is blinking when you experience this issue then your problem may be the ignition switch. This is a know problem with these vehicles. The repair is actually simple.

Disconnect the negative battery terminal.

Remove the switch. Open the switch unit up. (it has clips holding it together.) Clean the grease from the components and replace with a low temp dielectric grease. Put the unit back together and reinstall.

The passlock sensor in the ignition switch which reads your key as it is turned and sends that data to the Body Control Module did not read your key properly. Now it depends on model of Saturn you have. The Saturn Ion could have a bad ignition switch, but the Saturn L-Series could have a bad ignition housing. The Ion's are notorious for having an ignition switch issue which will cause the car not to start.

Please let me know if you need anymore info.

passlock symbol.... The ignition switch is faulty... very common on the ion 2003 to 2006.... new design switch in 07