As the title says I started getting these codes intermittently as of recent when trying to read my CEL codes. I contacted sct and they said it is an error or interruption when trying to read the codes. I can clear the screen and pull it back up right away and it lets me read and clear my codes strange ain it. Just for a little history I put my maf in with the plug a little to far back a while ago and smeared my wires on my plug it threw this 21000 error due to that and burnt up the 30 amp pcm fuse I replaced all of that and everything works great again for about 200 miles and now it’s showing this error intermittently. Any help or advice would be appreciated. The sct tech suggested a new obd cable and if that doesn’t clear up the error code to check all grounds and other connections. Thanks in advance.