DTC 41

Chart:

Code 41 Cylinder Select Error:

TEST DESCRIPTION
Numbers below refer to circled numbers on the diagnostic chart.

1. The Electronic Control Module (ECM) used for this engine can also be used for other engines, and the difference is in the Mem-Cal. If a Code 41 sets, the incorrect Mem-Cal has been installed or it is faulty and it must be replaced.

DIAGNOSTIC AIDS
Check Mem-Cal to be sure locking tabs are secure. Also check the pins on both the Mem-Cal and ECM to assure they are making proper contact. Check the Mem-Cal part number to assure it is the correct part. If the Mem-Cal is faulty it must be replaced. It is also possible that the ECM is faulty, however it should not be replaced until all of the above have been checked.