What does code p21dd mean on Def heater?
The latest part to fail was the reductant tank heater (DEF Heater). Upon cold start the check engine light came on with code P21DD. After a little reading I learned that this can result in “Limp Mode”. I was in the middle of nowhere in Northern Wyoming. Not cool! I drove down to Denver and replaced it that week.
What does code p21dd on Duramax tank mean?
Scan showed trouble code P21DD. “Diesel Reductant Tank Heater Circuit 1 signal low” was the translation. Did some research, and looks like it was a somewhat common issue on some LML D-Max trucks.
What is the code for a DEF tank heater?
Code P21DD (Reductant Tank Heater) def; p21dd; reductant; tank; heater; circuit; low; lml; cold; start; engine; def tank heater; reductant tank heater; fluid
How long is the p21dd covered under warranty?
Drained tank, removed tank. Replaced reservoir. Installed and filled tank. Used scan tool to command all heaters on-heater #1 is operating in spec again. Cleared code. Just wondering is this the “special warranty” I saw on the paperwork when I bought my truck used? I have about 76000kms on it now and no bumper to bumper left.
The latest part to fail was the reductant tank heater (DEF Heater). Upon cold start the check engine light came on with code P21DD. After a little reading I learned that this can result in “Limp Mode”. I was in the middle of nowhere in Northern Wyoming. Not cool! I drove down to Denver and replaced it that week.
Scan showed trouble code P21DD. “Diesel Reductant Tank Heater Circuit 1 signal low” was the translation. Did some research, and looks like it was a somewhat common issue on some LML D-Max trucks.
Code P21DD (Reductant Tank Heater) def; p21dd; reductant; tank; heater; circuit; low; lml; cold; start; engine; def tank heater; reductant tank heater; fluid
What is the p21dd code on my GMC?
2013 gmc, 16,370 miles, cel on with P21dd code and is currently at dealership for def heater element replacement. Vehicle has been there since April 1st and waiting for part to show up the week of the 14th from gm. So my vehicle will be there over two weeks and not very happy. Is it under warrenty yet?