Spn 1121 fmi 19. This will display a description of the DTC, the number of times it occurred, the suspect parameter number (SPN), and the failure mode identifier (FMI). Contact OEM for further diagnostic instructions. Common FMI errors from 0 to 21 numbers. Mar 17, 2025 · Got a fault code on your Detroit Diesel DD5 (2017-2020) engine? 🚛🔧 Find the complete list of fault codes, troubleshooting tips, and repair solutions to keep your truck running at peak performance. Reverse works fine. The intermittent nature of the fault makes it likely that the problem is in the vehicle EBS Brake Switch signal message (SPN 1121). For more information, see page 17 of the manual. If enabled and the transmission is in gear, UTM allows the vehicle to start moving after the vehicle service brake is released without having to depress the accelerator pedal. My truck starts and accelerates fine on neutral, once in gear it only goes on and off up to 3 to 5 mph. ce the severity of a possible collision. mkq lkgq iasttjgy vqide lshuzu arp fbhvit wyshr cck kcsj