27 March, 2025CAT 3126B Fault Code: 30-08 PID: Flash Code 29 SPN: FMI: Invalid PTO Throttle Signal The idle timer has expired to stop the engine. NOTE: This diagnostic code represents an event and not an Electronic System fault. Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Back to blog Leave a comment Name * Email * Comment * Please note, comments need to be approved before they are published.