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Hello all. 2015 Cruze Diesel with 105000 miles. Love the car when I’m driving it but nothing but emissions troubles with this vehicle! Already had NOx #1 replaced, NOx #2 replaced, DEF tank heater replaced, ECU re-flashed at least twice, now we are on the second time around. Just had another Check engine light come on, code P229E on scan tool. Started the countdown to doom. Replaced the NOx#2 sensor AGAIN and it cleared up the CEL and countdown but almost immediately after now I’m getting a DIC message about exhaust fluid quality poor and the dreaded countdown again. Had pending codes of P20E2 and P20E4 (EGT sensors) that cleared and a code of P20EE which goes back to the NOx sensor I believe. NOx #2 sensor was a GM OEM part from GMpartsdirect so I would hope would be good. Other than draining the DEF tank (how you do that I don’t know) and putting new fluid in (although I don’t think the old fluid is bad) what else can I try? Rob
 

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