P20EE

[AndyIRV]

I have been getting an intermittent P20EE code. will be on for 1-3 days then go off for 10-100 miles.
code reader says SCR NOx Catalyst Efficiency Below Threshold Bank 1, primary fix replace DEF injector.
2015 with 54500 miles.

 

[AndyIRV]

9/24 is the first available at the dealer. They said a solid CEL I can still drive but if it starts to blink shut it down. I've put 700 miles in it so far in under 2 weeks.

 

[Tremper126]

If you pull the def injector and clean it that should solve issue. TCDIESEL will be able to walk you the process I believe it’s on another thread somewhere but I believe it’s pretty straight forward

 

[Tremper126]

https://www.ecodieselram.com/forum/threads/replacement-engine-for-2014-ecodiesel.3536/#post-26248 Carl mentions it’s location and how to clean

 

[AndyIRV]

Thanks for the direction. I ended up purchasing a steam cleaner. it was almost completely closed off. steamer cleaned it in 30 seconds. No CEL since.