Ok im not sure what to do? I want the P0300 code gone for good. my question is if I get a aftermarket tunning system like AEM or UTEC (or any other brand for that matter) will it go away?

Also With one of these systems will my OBD2 prot still work for inspection in the state of texas?

Thanks for the help.

 

The ODB2 will not work on the AEM and CELs will be gone for good also.

 

Look into EcuFlash