I have a 2004 Kia Optima and it left me stranded on the road, came to a complete stop, I turned off the ignition then turn the key again and it started up fine. It had happen a couple of weeks ago and seem to be running fine till now. The speedometer works occasionally, cruise control does not work and the engine light is always on. Looking for solutions.

I had purchased its manual from online store www.reliable-store.com. Here's the site link
I am sure they will help you

Is this an automatic? P1527, Basically, the tcm is telling the pcm to turn on the lite. You could have tranny problems? Could be issue with transmission range sensor? I saw a service bulletin, kt2007020701, that is a relearn procedure, if the pcm--tcm or transmission has been replaced. I don't know if relearn will help or not?

I suggest you try one of those instant download manuals. My brother ( a mechanic) buys
it when he can't fix some technical issue He buys from www.reliable-store.com . A lot of mechanics actually do this. Website is very good for this. Must try it !!

first thing to do is find out if u have fire or fuel

the ignition module is to the left of the air filter, right against the right side of the engine. I replaced mine, just two screws and take off black plastic covering. Make sure u disconnect negative battery post first. When done hook negative back up. If engine light don"t go off for P0320 code, disconnect battery for 5 min and connect back, I let my battery stay disconnect overnight.

very possibly a timing belt broke if you had battery power and it was able to crank but not start...very easily figured out...turn key like youre going to start it and if it sounds like its spinning really wuick ith out startin then thats it

ignition control module i suspect

this problem is caused by one of the tiny little pins that are used to code the lock getting stuck, u can try getting some powdered Graphite lock cylinder lube to try and free it up, if that doean't do it you will need to replace the ignition lock cylinder, don't use anthing but dry lock lube, WD 40 or any kind of oily spray will make the problem worse in the long run. Lock lube is avil from any hardware store like ACE or Home Depot

key is not cut right

hi its probably the fuel cut off switch. in an impact an enerchia switch will cut off the fuel pump. your local dealer will tell you where its fitted and its just a push of the switch and away it will go.