Hello, brand new to the forums and in a bad spot for some help. Took over this 2014 diesel cruze from my wife about a month ago. 146k miles. My commute I'd 150 Mike's round trip. Leaving work to go home last week I get the exhaust fluid quality poor message and 100 miles till 65mph max. I stop on the way home and add new DEF thinking the fluid was low and no change. The car had a P20E4 fault and I changed the EGT 2 & 3 sensor, cleared the codes and they haven't came back. The car runs great, not sure what to. I had the DEF tank and Nox sensor recall done a while back. Someone on another site suggested checking the DEF injector. I've searched and cant find any info on this injector. I did find a labeled photo that gives me a rough idea where it is. I'm planning to pull and try to clean the Nox sensors to see if that helps. I was going to replace them but they are $200 each, I cant find any good info on how to test them, (if there is a way to test). I hate to take it to the dealer because the only info i can find on this problem are people spending 3k st the dealer to fix the issue with no real explanation on what the problem was.
I'm lost on where to go from here. I would expect it to have some code along with this problem to help point me in a direction but none. I'd appreciate any help.
I'm lost on where to go from here. I would expect it to have some code along with this problem to help point me in a direction but none. I'd appreciate any help.