Paccar PX9 DOC 2014-2017

Emission Backbone You Can Rely On: Paccar PX9 DOC (2014–2017)

What is it?
The Paccar PX9 DOC (2014–2017) is a Diesel Oxidation Catalyst designed specifically for the PX9 engine in Paccar trucks produced from 2014 to 2017. Its function is to oxidize unburned hydrocarbons (HC) and carbon monoxide (CO) in the exhaust before they exit the system, helping your vehicle maintain cleaner emissions.

Why Choose the Paccar PX9 DOC (2014–2017)?
This DOC is engineered to mirror the OEM exhaust layout—sensor placement, plumbing, and flow paths are aligned with factory design. By matching original configuration, it helps minimize installation complications, maintain exhaust balance, and ensure long-term operational stability.

Key Benefits
✅ Original Geometry: Built to match factory mounting positions and flow design
✅ Robust Build: Withstands high temperature and exhaust wear
✅ Cleaner Emissions: Facilitates oxidation of HC and CO to reduce pollutants
✅ Stable Operation: Lessens the chances of emission-related error codes
✅ Protects Exhaust System: Cleaner gas coming through helps extend life of downstream components

Applications
The Paccar PX9 DOC (2014–2017) is ideal for heavy-duty trucks, vocational rigs, and commercial fleets powered by the PX9 engine. It fits use cases ranging from regional hauls to long-distance freight operations where emissions compliance and system durability matter most.

Installation Notes
This DOC is designed to directly replace the original unit with minimal alteration. Still, professional installation is recommended to ensure all clamps, gaskets, and sensor connections are correctly sealed. After installation, clear diagnostic trouble codes and confirm that the ECU recognizes the new catalyst.

Final Thoughts
For consistent emissions performance over thousands of miles, having a dependable catalyst is essential. The Paccar PX9 DOC (2014–2017) offers an OEM-styled, precision solution to restore proper oxidation and support reliable exhaust behavior day in and day out.