DTC C1137: Reverse Gear Switch: Action
WARNING: This page does not describe the selected car, but rather 38 other vehicles, including the 2024 Ford F-550 Super Duty, 2024 Ford F-450 Super Duty, 2024 Ford F-350 Super Duty, 2024 Ford F-250 Super Duty, and 2023 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
This DTC sets when the when the reverse gear message sent from the GSM indicates the transmission is in REVERSE when other stability control inputs received by the ABS module indicate the vehicle is moving forward. RETRIEVE and REPAIR all non-network DTCs in the GSM. REFER to the Automatic Transmission External Controls article.