The Best 2004 Impala Check Engine Light Blinking Ideas. Converter if you keep driving, you will need to have the system scanned for trouble codes, probably has a code p0300. I pulled over and shut the engine off, hooked up my scan tool and read a p0300, random misfires, 2 of the same codes (i assume 1 was active and.

What do i look for. I pulled over and shut the engine off, hooked up my scan tool and read a p0300, random misfires, 2 of the same codes (i assume 1 was active and. Whereas a steady check engine light may mean you merely need to tighten you gas cap next time you stop in order to reset the service.