So we have a 2011 Isuzu NPR-hd that is giving us a few codes, one for the NOx sensor and one for the glow plug. NOx code is: P2201, glow plug code is: P0672 (cylinder 2). My question is, since there are only two NOx sensors (one before SCR catalyst and one after), is bank #1 before or after the DPF/SCR catalyst? Is manual regeneration required after changing the sensor? Additionaly, how are cylinder numbers counted, i.e. from front of truck 1-2-3-4, or 4-3-2-1. Thank You

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.