How can I tell if my SCR system is working?
How can I tell if my SCR system is working?
Check the following items to help determine if the vehicle’s SCR system is operating correctly. Complete repairs as needed for any other DTCs. Clear all DTCs. Using a scan tool, check the reductant concentration in the reductant system data.
How does Selective Catalytic Reduction ( SCR ) work?
The DEF sets off a chemical reaction that converts nitrogen oxides into nitrogen, water and tiny amounts of carbon dioxide (CO2), natural components of the air we breathe, which is then expelled through the vehicle tailpipe. SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere.
Why does DTC p20ee set even when the SCR is working?
There may be several reasons why DTC P20EE has set, even when the Selective Catalyst Reduction (SCR) system is functioning properly. The 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.
What does SCR stand for in diesel technology?
SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere.
Where does the reductant go in a SCR system?
SCR systems inject a reductant compound or a diesel exhaust fluid (DEF) into the exhaust in front of the diesel particulate filter and/or the catalytic converter. The precisely timed DEF injection elevates the temperature of the filtration element and allows it to perform more efficiently.
Check the following items to help determine if the vehicle’s SCR system is operating correctly. Complete repairs as needed for any other DTCs. Clear all DTCs. Using a scan tool, check the reductant concentration in the reductant system data.
Why is SCR called Selective Catalytic Reduction ( Def )?
It is called “selective” because it reduces levels of NOx using ammonia as a reductant within a catalyst system. The chemical reaction is known as “reduction” where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2.
There may be several reasons why DTC P20EE has set, even when the Selective Catalyst Reduction (SCR) system is functioning properly. The 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.
