Why do have to hold my key in the ignition of my 1995 Chevy Corsica 6cyl for it to run?

I have a 1996 chevy corsica and its almost at 130,000 miles. the service engine light comes on and never goes off (it used too though) it doesn't flash, it just stays on. I recently had the spark plugs changed, new brakes, oil change, and had the fuel system flushed, but the light is still on. Now when I drive it I have to drive with one hand on the wheel and one on the key to keep it turned into the ignition because if I let it go, it will completely cut off. What could be the cause of this? and How much am I looking at spending? Any help is better than no help. Thanks

Why do have to hold my key in the ignition of my 1995 Chevy Corsica 6cyl for it to run?Ignition switch (electrical part),roughly 100 buck to replace.Why do have to hold my key in the ignition of my 1995 Chevy Corsica 6cyl for it to run?This might not be it but ignition switch or the keyhole thingerbobber might be off a little bit so it's not feeling the key without the pressure of your hand, but i own a chevy corsica it's a wonderful car when it runs right.. My check engine like use to come on at certain points in my drive like 10 miles from home stay on for 10 miles and go back off. About a month ago I got my brakes done and an oil change it's been nothing but headaches since! Starter went bad changed that. I was idling really high figured that out.. Now this next issue is slightly harder and no one can figure it out! I have the car it acts up it stalls makes a ton of noises. I have my husband come check it out and it's fine. I think it's my transmission but can't be sure and well with the way the cost is of everything.. You can figure out the rest...



but good luck with your problem buddy hope it works well for you