Chevy Duramax DEF issues
I have been following a thread recently on duramaxforum.com which is following people that have had DEF problems with their 2011 and newer chevy duramax trucks. I happen to be one of them. My truck ...
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2011 Chevy crew cab, 3500 4 by.
NOX sensor replaced due to DEF message on DIC messages. ECM was reflashed. Miles approx 21,000. Result was message went away but the power seemed to drop and I lost just over 1.5 mpg towing. At 21,500 miles, DIC message saying exhaust filter being cleaned, keep driving till messages goes away. Message never went away and truck went into "limp" mode, 30 mph top speed running without a load. Took it back to same dealer, great to work with, and they did a manual filter clean and did a new ECM flash. Only have 5 miles on it since then. Truck had run perfect up till the original DEF fiasco. The dealer tested my DEF the first time and reported it was fresh and fine.
NOX sensor replaced due to DEF message on DIC messages. ECM was reflashed. Miles approx 21,000. Result was message went away but the power seemed to drop and I lost just over 1.5 mpg towing. At 21,500 miles, DIC message saying exhaust filter being cleaned, keep driving till messages goes away. Message never went away and truck went into "limp" mode, 30 mph top speed running without a load. Took it back to same dealer, great to work with, and they did a manual filter clean and did a new ECM flash. Only have 5 miles on it since then. Truck had run perfect up till the original DEF fiasco. The dealer tested my DEF the first time and reported it was fresh and fine.
