Code 41 - Cylinder Select Error

Due to the same ECM being used for different engines, it is necessary for the engine application to be selected. This is done by leaving terminals "B12" and "D-3" open for V6 applications. Code 41 will set if the reference pulses are not equal to a value selected within the PROM when engine RPM is less than 2000.

NOTE: Test numbers refer to test numbers on diagnostic chart.

See INTERMITTENT PROBLEMS in the article CEC TESTING W/O CODES (TROUBLE SHOOTING) in the ENGINE PERFORMANCE section.

Fig 1: Code 41, Cylinder Select Error, Schematic

Fig 2: Code 41, Cylinder Select Error