CAT 3126E Fault Code: 91-08 PID: Flash Code 32 SPN: FMI: Invalid Throttle Signal Posted by Diezel Solutions on March 31, 2025 The Speed/Timing signal or Engine Speed/Timing Sensor #2 is lost and then returns (intermittent). Share Share on Facebook Tweet Tweet on Twitter Pin it Pin on Pinterest 0 comments Leave a comment Name Email Message Please note, comments must be approved before they are published