DD15 Troubleshooting – Section 37 SPN 191 (CPC)

Section 37
SPN 191 (CPC)

This SPN indicates the J1939 ETC1 message is missing and the transmission output shaft speed signal is erratic or missing.‪

37.1 SPN 191/FMI 9

37.2 SPN 191/FMI 13

37.3 SPN 191/FMI 19