Paccar PX6 DOC

Dependable Emissions Control for the Paccar PX6 Engine

What is it?
The Diesel Oxidation Catalyst (DOC) for the Paccar PX6 engine is a key emissions-control component. It converts hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream into cleaner, less harmful gases, helping the aftertreatment system maintain consistent and trouble-free operation. 

Why choose this DOC?
Designed specifically for the PX6 engine (model years 2011–2013), this DOC ensures precise fitment and reliable emissions function. A worn or blocked catalyst can result in elevated exhaust restriction, frequent regeneration events, or emissions-related fault codes. Installing the correct DOC helps support clean exhaust flow and stable system performance. 

Key Benefits
✅ Converts HC and CO into cleaner exhaust output
✅ Supports downstream aftertreatment components
✅ Helps maintain steady exhaust flow and reduce restriction
✅ Direct-fit design with no modifications required
✅ Built for demanding heavy-duty and high-temperature conditions

Applications
This DOC is ideal for medium-duty trucks and equipment powered by the Paccar PX6 engine (2011–2013), particularly in operations where emissions compliance and dependable exhaust system behavior are critical.

Installation Notes
Ensure the exhaust system and aftertreatment components are fully cooled before beginning service. Inspect the DOC housing, adjacent piping and hardware for soot buildup, cracking or other signs of damage. Install new clamps, gaskets and seals as required. After installing the DOC, clear any emissions codes and perform diagnostics to confirm proper exhaust system operation.

Final Thoughts
If your PX6-equipped vehicle is showing signs of elevated exhaust restriction, emissions warnings, or inconsistent aftertreatment performance, replacing the DOC with a correct-fit unit is a practical way to restore clean, stable exhaust flow and support reliable operation.