prounds Report post Posted September 28, 2015 Any info on Cummins ISC 360 hp fault code 1973. I was told it could be a temperature sensor in catalytic converter, a booster sensor, or fuel injectors (Cummins has new injectors to fix problem with original). That being the injectors spraying to much fuel into catalytic converter during regeneration. Would think Cummins would have advised Newmar of this problem. Replaced the temperature sensor but I feel like I'm driving round with a problem that could occur anywhere anytime. Share this post Link to post Share on other sites
