Fault Codes/Rehlko/SPD SENS FLT SDRehlkoSPD SENS FLT SDUnclassifiedSpeedWhat This Code MeansEngine speed sensor failure; Engine stalledPossible Causes•Engine speed sensor failure•Engine stallSuggested Actions1Contact an authorized distributor/dealer for serviceRelated Rehlko Fault CodesOVERCRANKENGINE SPEED LOW SD *ENGINE SPEED HIGH SD *ENG SPEED LOWENG SPEED HIGHADVANCED DIAGNOSTIC ACTIVEADVANCED DIAGNOSTICSPEED SENSOR FAULTSPN 730 FMI 3SPD SENS FLTSPN 730 FMI 4SL0-5311Browse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for SPD SENS FLT SD on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about SPD SENS FLT SDGET THE ANSWERFree account required — we'll bring your question with you.