speck Report post Posted June 17, 2019 So we started our trip from CO to SC. Got to Hays KS, and received a message "Crankshaft speed circuit failure, Stop and repair" Have stopped in Hays, KS waiting until tomorrow (Monday) to talk to a shop. Any ideas of how serious this error code (code 115) is. Engine is a Cummins 330 hp (year 1998). Didn't notice any difference in the engine running, nor any signs of exhaust smoke. Just wondering what to expect tomorrow. Share this post Link to post Share on other sites
kaypsmith Report post Posted June 17, 2019 Hopefully will only be a sensor going bad, especially with no slow down or over speed of the engine. Good luck! Share this post Link to post Share on other sites
jleamont Report post Posted June 17, 2019 Speck, Cummins has two, it will run if one has failed but needs to be replaced ASAP. I would recommend replacing both since they sit right next to each other. Share this post Link to post Share on other sites
