Code 41, Cylinder select error
Due to the same ecm being used for different engines, it is important that the proper prom is installed for the particular engine, a incorrect prom, not installed properly, or faulty. Another cause is the pins of the harness are not properly connected to the appropriate pins on the ecm, and/or the grounds could be open. For V8 applications, ecm pin D3 is grounded.
|B12 Use 4 cylinder input||D3 Use 6 cylinder input|
|4 cylinder Ground||4 cylinder Open|
|6 cylinder Open||6 cylinder Open|
|8 cylinder Open||8 cylinder Ground|
The chart above shows the appropriate pins on the ecm that need to be grounded for proper engine family.
Flow chart index