When you start the car with the key.the key does not turn

A year, make, model, and engine size would help but I will through this at you.

Instead of just trying to start the car turn the key to the run position and wait 3 seconds. Turn the key off and immediately turn the key back to the run position and wait another 3 seconds. Turn the key off then try to start. Do this every time you try to start the car. If you symptom never occurs when you start the vehicle like this than I would suggest taking a closer look at the fuel system.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Last time i had this problem, my car wasnt all the way in park, so what i would try is:
1: apply the break
2: push up on the gear shift, to make sure its in park.( if you can move the gear out of park, move it all the way to drive 2, then back to park.
3: try the key again

Ok to learn the key you have to do what is call 10 minute learn , turn the key to start in attempt to start the car without turning the key off after you do this leave the key on for 10 minute until light goes out, After the security light goes out turn key off for a second or two and then try to start. If you have a new key you have to do a 30 minute learn you have to do the same thing as you did for the 10 minute learn but 3 time try and start without turning key off wait 10 minutes until security goes out then try and start again and leave key on, after you do this 3 time (30 minutes) the 3rd time is where you turn the key of for a second or two before starting.

turn the key on and wait till the security light stops flashing ( this could take as long as 30 minuets ) then turn the key off then back on but do not try to start the engine and wait till the security light stops flashing ( again this could take as long as 30 minuets ) then turn key off then turn key on and start engine.

Hello: Try this, Turn key on, try to start, let k/switch come back to run, let set for 10min(security light out) turn key off 10sec, turnkey back on let set 10min, turn key off 10 sec, turn key on let set 10min. turn key off 10sec. turn key on start car if it doesn't start and the security light is flashing you have a passlock problem and it will require a new lock cylinder assembly and the above learn procedure.

Hello: Will try to give you instructions: Attempt to start car, leave key on (security light flashing) let set for 10 minutes, After 10 minutes security light out. Turn key off for ten seconds, turn key on, let set for 10 minutes, turn key off for 10 seconds. turn key back on let set 10 minutes, turn key off for ten seconds, the engine should now start and stay running.

After you replace the ignition switch turn the key to start the car and release leave the key were it stops after trying to start wait 10 minutes until security light goes out turn key to full off position then repeat the above procedure two more times for a total of three on the 3rd attempt to start car wait for light to go out then turn key to full off positoion wait 10 seconds then try to start car body control module should learn new pass code and the car should start.
Big john, J@J Automotive

You either have a bad solenoid on your starter OR a bad ignition switch as these are the only two things that can cause the symptom you describe... I lean to the solenoid first, RARELY does an ignition switch sieze up in the start position but it is a possibility. Several national chain parts stores can test the starter for you (GM starters have the starter solenoid mounted directly to the starter and you need to remove the starter to get to it, so you would take the whole unit in to test it... REMEMBER to disconnect the battery first!)

Be sure its all the way in park or try neutral.Its possible that security system does not recognize the key. Is security light flashing or on steady? Shut all doors and windows,trunk,hood, turn off all accessory's,roll down drivers window, turn key off and remove for at least 1 minute, insert key into ignition, try to start leaving key to run position for 20 minutes, turn key to off,wait 15 seconds, try to start again leaving key to run, wait 20 minutes, turn key off,wait 15 seconds, try to start, again leaving key to run, wait 20 minutes, turn key off, wait 15 seconds, try to start. This should relearn key code. It may relearn after 1 learn cycle and start if system is ok. Hope this helps and that the weather is dry and warm for this procedure! This is not always a fix, but works most of the time.

THe tumblers in the ignition cylinder are probably worn therefore won't alow you to turn the key. Try inserting the key and jiggle it around while you are trying to start it. Sometimes it will work.