DPF, EGR & DEF Diagnostics and Repairs

Modern diesel engines are powerful and efficient—but they rely on complex exhaust and emissions systems to keep them running clean. When these systems fail, you may see warning lights, limp mode, or excessive smoke. At Rob’s Automotive Repair Center in Clackamas, OR, we provide complete diesel exhaust and emissions repair, including DPF cleaning, EGR service, and DEF system diagnostics. If you’re searching for diesel exhaust repair near me, we’re your trusted local solution.

Why Diesel Emissions Systems Matter

Your truck or car’s exhaust system does more than quiet the engine. It controls soot and emissions through:

DPF (Diesel Particulate Filter) – traps soot and requires regeneration
EGR (Exhaust Gas Recirculation) – lowers combustion temps to reduce NOx
SCR/DEF Systems – injects diesel exhaust fluid to neutralize pollutants
NOx & differential pressure sensors – monitor performance and efficiency

When these parts clog, fail, or break down, performance and fuel economy drop—and repairs can’t wait.

Diesel Particulate Filter (DPF) Service

A clogged or failing DPF can cause:

Reduced power or limp mode
Frequent regenerations or failed regen cycles
Check engine lights for emissions codes

We offer:

DPF cleaning to restore flow and function
Sensor testing and replacement
DPF replacement when filters are beyond repair

Our goal is to restore proper operation and prevent costly damage.

EGR System Repairs

The EGR system is prone to carbon buildup. Common issues include:

Rough idle or stalling
Excessive black smoke
Poor fuel efficiency

We provide:

EGR valve cleaning or replacement
EGR cooler repairs
Intake cleaning to remove carbon deposits

Restoring your EGR system improves airflow, combustion, and overall performance.

DEF & SCR System Repairs

Newer diesels use DEF (Diesel Exhaust Fluid) to reduce emissions. Problems we fix include:

DEF pump or injector failures
Crystallized DEF clogging lines
Faulty NOx sensors triggering warning lights

We perform DEF/SCR diagnostics and repairs to keep your diesel compliant and reliable.

Exhaust System Repairs

Not every issue is emissions-related. We also repair:

Exhaust leaks at manifolds, flex pipes, or joints
Turbo downpipes and mufflers
Upgraded exhaust components (compliant with emissions requirements)

A solid exhaust system keeps your diesel quiet, safe, and efficient.

Why Choose Rob’s for Exhaust & Emissions?

Advanced diagnostics for diesel emissions systems
OEM-quality parts for lasting repairs
Experienced technicians across Cummins, Power Stroke, Duramax & European diesels
4-year/48,000-mile nationwide warranty on qualifying repairs
Trusted local shop serving Clackamas and the Portland metro

We don’t guess—we fix diesel emissions problems right the first time.

Serving Diesel Drivers Across Clackamas & Beyond

From work trucks to European diesels, we service exhaust and emissions systems for drivers across Clackamas, Oregon City, Happy Valley, Damascus, and Milwaukie. If you need diesel exhaust repair near me, Rob’s Automotive Repair Center is your trusted choice.

Schedule Your Diesel Exhaust Repair Today

Don’t let emissions problems keep your truck in limp mode or put your car off the road. From DPF cleaning to EGR or DEF repairs, our team gets your diesel back to full power.
Call or schedule online today for professional diesel exhaust & emissions service in Clackamas, OR.

Alexandra C. ★★★★★ in the last week
I'm late to review Rob's, as they took care of me back in August, but these guys are amazing!!! Carter was the main employee I spoke with over the phone and he was phenomenal. He also came in on his day off to make sure I had … read more my car secured in a safe place until they opened. Corey also really helped when I came in personally and by going through some paperwork to ensure I wasn't being screwed over by the company I had been going to the last several years (which it turned out i kind of had been). Carter and Corey worked together to find me the best ways to handle the situation and have me honest suggestions without making me feel manipulated into paying for maintenance through they're company - they were there to help and make sure that I was safe while driving my vehicle. While being very professional and knowledgeable, they went up and beyond what I could have hoped for. The company understands that life happens and they do everything (within reason) to work with your time and budget to make sure that their clients are well taken care of and that the work that they do is thorough and accurate.I HIGHLY suggest using Rob's Automotive for your vehicle needs because of their honesty, hard work and their excellent customer service.Thank you again, especially Carter and Corey, for helping me get through a rough time with my little car and helping me feel confident that I made the right choices on how to handle my car issues. I will absolutely be coming back!

Diesel Exhaust & Emissions System Repair