CAT 3406E (Prefix 1MM or 2WS) Fault Code: 35 PID: SPN: 190 FMI: 0 Engine Overspeed Warning Posted by Diezel Solutions on April 6, 2025 Conditions Which Generate This Code: The engine speed exceeded 2600 rpm for more than one second. This is not a diagnostic code, but a warning code. Talk to driver to see why this happened. 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