Wow your running that engine hotttt, you might want to lower down the fan on if controlled bye the ecm. The most common cause of the code 42 is poor connection or faulty knock sensor. from the center connection to the body during malf check the ecm expects to see 3.9k ohms. This issue is rarely ever the esc knock board soldered on to the memcal but could be the ecm. You should check the connections even at pin f9 .