Originally Posted by KGross
I own a 2012 Tiffin Allegro Breeze Class A motor home with an International 6.4 liter MaxxForce7 rear engine diesel engine. On a return trip from Idaho to Western Washington I experienced an engine check light and an exhaust high temp light (only occasionally when the engine was loaded as in climbing a hill). I have had my mechanic attempt to solve the problem. However, after replacing some components including an exhaust back pressure sensor, he has been unable to clear the exhaust high temperature light. My mechanic suggests that I may need a current ECM software update to provide a more accurate view of outstanding issues. How may I obtain an ECM update for my motor home? I have searched for International engine repair shops in the Puget Sound Region and RWC Group is identified. However, after speaking with the shop foreman in Tacoma they DO NOT WORK ON motor homes.
If a mechanic is changing a couple of parts, that do not solve the problem and charging you for them he is not a very good mechanic or he does not have the right diagnostic equipment for your motor, which makes him not a very good mechanic.
Upgrading the software in your case means the current software can not diagnose the problem. Unless it has become corrupted I doubt that is the case.
As far as where the shop that will and can work on your rig is you will have to keep searching and probably plan a trip.
Check engine light is an emissions issue which could be as simple as a loos O2 sensor needs tightening or as big as a new ECM. JMHO