M Indicator Does Not Come On Even Though The Paddle Shifter Is Operated In Sequential Shift Mode (9-Speed A/T) (2018 2019)

Probable cause(s)

• F-CAN communication line error
• Gauge control module defective
• TCM defective
• SBW shifter assembly defective
• Paddle shifter defective
• Hot mode protection 

Notes 

• Check the F-CAN communication line .
• Check the F-CAN communication line by using the gauge control module self-diagnostic function .
• Check the indicator drive circuit in the gauge control module by using the gauge control module self-diagnostic function .
• Check for a poor connection at the SBW shifter assembly.
• Inspect the paddle shifter .