After-Treatment System Repair & Service
DOC, DPF & SCR Service
Keep your emissions system running clean and compliant with expert after-treatment service from AAA Trailer Repair in North Canton. We diagnose and repair DOC, DPF, and SCR systems to restore performance, fuel efficiency, and reliability.
Diagnostics for Modern Emission Systems
After-treatment systems are complex and essential for meeting today’s emissions standards. Our technicians use advanced diagnostic equipment to identify faults in the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR) systems — ensuring your truck runs efficiently and meets DOT compliance.
We provide complete inspection, cleaning, and repair of:
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DOC (Diesel Oxidation Catalyst) — Reduces carbon monoxide and hydrocarbons.
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DPF (Diesel Particulate Filter) — Traps and burns soot particles.
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SCR (Selective Catalytic Reduction) — Converts nitrogen oxides into harmless nitrogen and water.
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DEF system components (pumps, injectors, sensors)
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Pressure sensors, temperature sensors, and wiring harnesses
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Fault code diagnostics and system resets
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Regeneration system checks
- Engine derate issues
Signs Your After-Treatment System Needs Service
Addressing these problems early helps prevent downtime and ensures your truck stays compliant with emissions regulations.
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Warning lights or fault codes for emissions
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Frequent regenerations or failed regen cycles
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Loss of power or poor fuel economy
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Excessive exhaust smoke
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DEF system or sensor malfunctions
Why Choose AAA Trailer Repair
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32 Years of Experience servicing heavy-duty trucks and trailers
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Veteran Owned & Operated
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DOT Brake & AC Certified Technicians
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Same-Day Service in Most Cases
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Easy Access from I-77, Exit 111
Hours:
Daytime Roadside Service – No Milage
MONDAY – FRIDAY: 8:00 AM – 6:00 PM
SATURDAY: 9:00 AM – 1PM
NIGHT DROP AVAILABLE
Phone
Phone: (330) 966-7467
Fax: (330) 966-7468
Located Off Exit 111
Address
6759 Promway Ave NW
North Canton, OH 44720