Cummins ISB 6.7 DOC

Emissions Control Module: Cummins ISB 6.7 DOC

What is it?
The Diesel Oxidation Catalyst (DOC) for the Cummins ISB 6.7 engine is a critical emissions system component. It oxidizes hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream, preparing gases for downstream after-treatment stages and helping maintain cleaner emissions.

Why Choose the Cummins ISB 6.7 DOC?
This DOC is engineered specifically for use with the Cummins ISB 6.7 engine, featuring correct mounting geometry, sensor interfaces, and exhaust flow design. Choosing the properly specified DOC helps ensure reliable installation, maintain exhaust system balance, and reduce the risk of back-pressure or after-treatment faults.

Key Benefits
✅ Designed for direct compatibility with ISB 6.7 engine mounting and sensors.
✅ Built to handle high-temperature exhaust and heavy-duty operating conditions.
✅ Helps reduce emissions by oxidizing HC and CO before entering further treatment stages.
✅ Supports smoother system operation and fewer emissions-related fault codes.
✅ Protects downstream components by delivering cleaner exhaust flow to DPF and SCR.

Applications
This DOC is suitable for commercial trucks, vocational vehicles, and equipment powered by Cummins ISB 6.7 engines. It is particularly useful in medium-duty to heavy-duty operations where emissions control and system longevity are important.

Installation Notes
Professional installation is recommended. Before removal, verify that the engine model and series match your application. Remove the old DOC, inspect all mounting flanges, sensors, and gaskets for wear or contamination. Clean all mating surfaces thoroughly. Install the new DOC according to proper orientation and torque specifications, replace any seals or hardware as required, reconnect sensors and wiring, clear fault codes, and then run the system to confirm proper exhaust readings and system behavior.

Final Thoughts
A correctly installed DOC is foundational to a functioning emissions after-treatment system. The Cummins ISB 6.7 DOC offers a purpose-built solution that supports compliant operation, system health, and reliable performance in demanding applications.