How to find the Diagnostic Code on a HEUI engine?
How to find the Diagnostic Code on a HEUI engine? Count the first sequence of flashes in order to determine the first digit of the diagnostic code. After a two second pause, the second sequence of flashes will identify the second digit of the diagnostic code. Any additional diagnostic codes will follow (after a pause) and will be displayed in the same manner. What causes an intermittent diagnostic code on a truck? The most likely cause of an intermittent code is a faulty connection or damaged wiring. Next is a component failure such as a sensor or a switch. The...