Its the code of DEATH, meaning in 300days ur car will explode.lol

Check for vacuum leaks.

I changed my plugs thinking it would solve it, but it came back today after I installed catch cans. I would check for leaks and clean MAF because it's cheapest.

Bump

So I am in this boat as well. I have reset the code and it came back after like 20min of driving. I just changed my oil (irrelevent) and changed my spark plugs. I started the car and the light is still on and it was idling kind of rough. I am going to clean my Maf's and try to reset the light tonight or tomorrow and see if that helps. I have AEM intakes.

My old plugs didn't look too bad. The car only has 47k on it, 2010 Z Touring.

You could have a bad cat converter or 02 sensor. Not sure if they give off a different code or not.

So had this code, I first cleaned MAF's, then changed spark plugs. The week after I changed spark plugs a code came back for my crank shafts and then it disappeared for a day. I haven't seen any codes pop up since.

So i got my p0300 to go away finaly. I replaced my spark plugs, pcv valves, and got silicone hoses for the crank breathers going to my AEM intake from Z1 to replace the stock ones that don't fit very well with an aftermarket intake, and got the silicone hoses for the pcv valves too. Cleared the code and it has not come back and the car is running wonderfully. https://resources.oncourse.iu.edu/ac...k/IMG_5133.JPG

I get this code about once a month after clearing.. car drives normally after clearing

Idk about constantly clearing a code just to keep driving... Usually if your car is trying to tell you something you should tend to it. You cant hit the "clear" button when the car is stranded on the road :ugh2:

I've had this issue for over a year now. I keep searching the forums if there's a solution. I got the problem after a issue with a timing sprocket failed. Dealer fixed that but couldn't find what the idle issue was from. Changed all the parts they asked coil pack, spark plug, timing sensors. Nothing fixed it. The car has been driving fine, I can reset the code and it will idle fine for a few minutes then the code will come back and idle high again.