DTC 41

Code Chart 41:

ECM:

TEST DESCRIPTION: Number(s) below refer to circled number(s) on the diagnostic chart.

1. The ECM used for this engine can also be used for other engines, and the difference is in the PROM. If a DTC 41 sets, the incorrect PROM has been installed or it is faulty and it must be replaced.

DIAGNOSTIC AIDS:
Check PROM to be sure locking tabs are secure. Also check the pins on both the PROM and ECM to assure they are making proper contact. Check the PROM part number to assure it is the correct part. If the PROM 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. For additional information - Intermittent Malfunctions