What does trouble code 43 on an ESC mean?
What does trouble code 43 on an ESC mean? Trouble Code 43 indicates that there may be a malfunction in the Electronic Spark Control (ESC) circuit. ESC is used to sense spark knock (pinging) and retard the timing to eliminate it. What does code 43 mean on a GM engine? Trouble Code 43 indicates that there may be a malfunction in the Electronic Spark Control (ESC)circuit. ESC is used to sense spark knock (pinging) and retard the timing to eliminate it. A knock sensor (located at the rear of the engine block) sends signals to an ESC module which then...