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87 Posts
There are a couple threads with limited info for this code so I figured I would start another to document my experience.
1/3/2016 - Started the car and found the CEL on. Checked code with the scanner and found P21DD. Code reader would not give me further info. Searching found this to be a problem with the DEF heater, low current. Cleared code. On restart the CEL came back. Ran some errands. Cleared code upon return home.
1/4/2016 - 4 starts and 120 miles no code.
1/5/2016 - 2 starts and 80 miles not code. On 3rd start CEL. Note temps have been 20+ and the car is kept in a garage.
1/6/2016 - PMed Chevy Customer Care to ask about coverage under emissions warranty. The owners manual states the DEF tank is covered and this begin a component in that tank and part of a system that is purely emission control based, I think it should be covered. Will call the dealer next and ask.
1/7/2016 - Chevy Customer Care PMed back and cannot help. Going to call the dealer and see what they can do. I will do the work myself if its not covered.
1/3/2016 - Started the car and found the CEL on. Checked code with the scanner and found P21DD. Code reader would not give me further info. Searching found this to be a problem with the DEF heater, low current. Cleared code. On restart the CEL came back. Ran some errands. Cleared code upon return home.
1/4/2016 - 4 starts and 120 miles no code.
1/5/2016 - 2 starts and 80 miles not code. On 3rd start CEL. Note temps have been 20+ and the car is kept in a garage.
1/6/2016 - PMed Chevy Customer Care to ask about coverage under emissions warranty. The owners manual states the DEF tank is covered and this begin a component in that tank and part of a system that is purely emission control based, I think it should be covered. Will call the dealer next and ask.
1/7/2016 - Chevy Customer Care PMed back and cannot help. Going to call the dealer and see what they can do. I will do the work myself if its not covered.