2003 Saturn Ion will not start when it gets real cold other wise starts fine....do you have any idea what causes this

First of all your service light came on so give it a service then have the service light reset then check the thermastac, water levels and the choke is working properly and all the elecric working parts are good

there was a lot of problems with the ignition switch and its the same as the chevy cobalt so you can get it at a chevy dealer

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.

I would remove the battery cables,and clean the battery post,and cable ends real good,clean ,and shiny,then replace them.

I have 2003 Saturn Ion. I had this problem over and over 2006 - 2008. IT IS THE IGNITION SWITCH. IT IS DEFECTIVE IN ALL ION'S.The replacement may be defective also, not sure. Mine was driving fine, went ino store for 1 hr came out stone cold dead, would not start and key **** in. Had to have towed to Saturn. They said it was battery and replaced battery.I said this did not make sense. 6 yr battery only 3 yr old , never weak start, never run down, in summer? It happened again 2 mo later. They tried to say battery , I said no. They checked battery. It was fine. Could not find problem. They did total electrical check. It happened again 1 mo later. drove into feed store. Went in came out it happened again. I got jump from someone 30 min later and started right up. 2 wks later same, I got jump 20 min later started. 1 mo late same. Sometimes it would just start up. Took to another Saturn place. They said Ignition switch, saturn was having big problem with this on Ions. Got changed and no problems for 1 yr. I was talking to repesentative at Saturn Headquarters. I told the problem. They said the ignition switch has an electrical component, or it is hooked to electrical component. THEY SAID IF I HAD JUST SAT THERE 20 MIN WITH KEY OFF, THE COMPUTER CHIP FOR IT WOULD HAVE RESET ITSELF WHEN IT COOLED DOWN AND I COULD HAVE STARTED IT EACH TIME. IT WAS BEST TO GET REPLACED AND NOT WORRY, BUT THIS WILL HELP YOU IN A STRESSFUL PINCH, UNTIL YOU CAN GET THE IGNITION SWITCH REPLACED. NOTE: Go to Auto Zone , O 'Reilleys, Pep Boys etc, get a repair manuel , CHILTON $ 23- $ 25 , for your year , make, model car. CHILTON IS MUCH BETTER THAN HAYES MANUEL. It is wonderful and many things you can do yourself.

nothing wrng with it pull cover off and spray some grafite in it real simple

Is there gas in it?

it is more than likley the power steer pump not pumping or the belt is broken

The fix for this problem is well known, so is the cause. GM needs to step up in my opinion. You can fix it yourself if you're willing

http://moontaj.com/passlock

Google Saturn Ignition Lock and you'll see that this is a major problem with these cars. I bought a 2003 Ion in May 2008 and have had it in the shop 3 times for starting problems. I just had the entire ignition lock system replaced last month and so far it's been okay. Saturn will acknowledge that this is a problem, but there is no recall or true fix for it.