did the car overheat?? it may have damaged the motor.

start with basics, fuel pressure, compression and spark tests.

code 12 is normal with key on engine off. nothing he did changed this code. 21 is tps which could need adjusting, could be bad or wiring issue.

Roy

Answered by ASEMaster6371 (expert)
24,845 answers provided

Did you erase the previous codes and recheck them again?

Answered by KHLow2008 (expert)
39,869 answers provided

My dad help me adjust the timing today and that seemed to do the trick! The light is off for now....

Response from alaina_rocha
1 question asked

How did he do that? I believe you have an idling fault and cleaning the throttle body and IAC coupled with adjusting the idling speed would solve the prioblem

If you keep adjusting evrything, you stand the chances of getting everything out of specs if you do not have any equipment to take readings.

Answered by KHLow2008 (expert)
39,869 answers provided

I think you are right, drove the car today and it died every time I came to a stop

Response from alaina_rocha
1 question asked

I just went through this same ordeal, what finally fix my car it was the ignition coil, it had a crack in it. I got the part at auto zone for $40.00 thats with tax, and had it replaced for 45 dollars labor

Answered by elizabethmcdaniel
1 question asked

Thanks for the input.

Answered by KHLow2008 (expert)
39,869 answers provided