Exhaust Catalyst and Exhaust System: Notes
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The exhaust catalyst and exhaust system consists of the following components. For additional component information, refer to ENGINE CONTROL COMPONENTS in this article.
- Four exhaust gas temperature (EGT) sensors that measure the exhaust gas temperature.
- An oxidation catalytic converter (OC) that reduces emissions and assists in diesel particulate filter regeneration.
- A selective catalytic reduction (SCR) catalyst that chemically reduces nitrogen oxides (NOx) to nitrogen (N 2 ) and water (H 2 O).
- A reductant injector that sprays diesel exhaust fluid (DEF) into the exhaust system as a component of the NOx reduction reaction.
- Two diesel particulate filter pressure sensors measure the gauge pressure of the exhaust gas before, and after, the diesel particulate filter.
- A diesel particulate filter that traps soot and ash particulates.
- Two NOx sensors that detect levels of NOx in the exhaust stream, to monitor SCR efficiency.