I need a new key for my 2003 alero ,the key is so used it gives me problems with starting my car ...thank you for your help..

turn your key on let it in on position for about 12 minutes security light will return to solid. turn key off and restart

look for security light when you turn on key if it lights and doesn't go off leave key on for ten minutes then turn key off and then try to start

most likely ur ignition is going bad and u have to get from the dealer n coded to ur car its $160

Looks like its having trouble finding the idle. As for the TPS problem.

It doesn't have to be the security. a dead battery won't let the car crank either. With a security problem the car will crank but not start. The security can be reset if the battery is charged and up. Turn the key on ( do'nt crank ) the security light will stay on if it needs to be reset. If it remains on leave the key on for 15 minutes around then it will go out. turn the key off and then turn it right back on, the security light will be on again. Leave the key on till the light goes out again, then turn it off then turn it back on , wait again when it goes out turnthe key off then right back on then crank the engine and it should start. With a scanner the code will be security neweds to be reset. Thia is all anyone can do to reset the security and it's what you were charged $450 for. Following directions.

if this has an automatic transmission a new key cylinder will be needed to repair If its a stick shift (highly unlikely) a tab by the cylinder must be pressed down to move the key to lock to remove

check ignition module

well if you security light is on, then you have to put your key in the on position for exactly 10 mins and wait until the light blinks and then turns of and then you turn the key off and they you can start it. i have a 2002 alero and it works for my car.

find the buzzing noise...likely its the fuel pump relay.

Mass Air Flow Sensor.