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Discussion Starter · #1 ·
Hey guys first post I'm sure its be asked alot but I have a 2013 that was getting codes for bad nox sensor I replaced it and then it went into limp mode with the poor exhaust quality message. I replaced the nox sensor and took to dealership to get flashed and they charged me 145 dollars to tell me the mass air flow sensor was bad and couldn't do the relearn. I have replace both mass air flow sensors its still in limp mode I have a cts3 and have cleared codes and done a manual regen and still getting message does the nox sensor still need to be relearned or am I having another issue. What scan tool can I get todo that and fix what I got going on without going back to the dealership truck has been down 3 months now need some help to get back on the road.
 
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