WebSep 10, 2024 · Engine Light ON (or Service Engine Soon Warning Light) Code P21DD Description The Selective Catalyst Reduction (SCR) system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of Diesel Exhaust Fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst. Web What Does the P21DD Code Mean? The Selective Catalyst Reduction (SCR) system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of Diesel Exhaust Fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst.
Ford Powerstroke Diagnostic Trouble Codes Thoroughbred Diesel
WebDec 7, 2024 · P21DD dtcv code on a 2016 2500 HD GMC Truck. Has to do with P21DD dtcv code on a 2016 2500 HD GMC Truck. Has to do with heaters in the DEF tank? Doesnt seem like an immediate worry but not … read more Eric 53,654 satisfied customers Disclaimer: Information in questions answers, and Show Less WebFeb 4, 2024 · 4 Posts. Discussion Starter · #1 · Jan 3, 2024. So I went out to my truck to start it this morning and check engine light came on. Diagnostic code P21dd state reductant heater A current to low. This is the second time I have received this code since I have owned the truck. first time was under warranty this time I am afraid it will not be ... goth pencils
10/13/2024 Engine Controls and Fuel (ALL Diagnostic …
WebMay 2, 2016 · Same code, P21DD. Back to the shop. Click to expand... I just threw this code P21DD (Reductant Tank Heater 1 Low Current) today at 49k miles. I took it in and they cleared the code. After 3 separate restarts the CEL was back. ... I got my reduced engine light about a week ago followed with the P21DD code and another for diesel particle filter ... WebFeb 3, 2024 · My truck has code P21DD? My name is Nathan, I am hoping to get some insight on what code P21DD means. Last week my def tank froze with a full tank of def, … WebJun 20, 2024 · The video focuses on the basic Ford specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into pro... goth of nights