ERROR CODE P20EE NEED FIX?

Question

ASKING WHERE THE SENSOR ARE LOCATED , SO I MAY REPLACE. Only code but the also intermittently receiving "low quality DEf fluid" message. This goes no & off.

Answer 1

P20EE NOx catalyst below threshold.
This is the second NOx sensor, tere one in the front that monitor the Nox output of the engine , the one that setting the code is the downstream or the one after the catalytic. If you have a Low quality message for the the DEF fluid do that first. a build up of crystalized DEF can set the DEF fluid message. which may be the reason for P20EE.