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On-site troubleshooting for semi trucks and diesel equipment
Advanced electronic diagnostics and programing using dealer level software Detroit Diesel DiagnosticLink (DDDL) and Cummins INSITE.
• Fault code troubleshooting
• Programing
• Sensor and wiring diagnostics
• Engine derate diagnostics
• Electrical system testing
Forced regeneration and emissions system diagnostics for trucks experiencing derate or aftertreatment problems.
• Aftertreatment troubleshooting
• DEF and DPF system diagnostics
• Parked regen
• 5-hour SCR regen
Mobile roadside diagnostics for trucks experiencing engine problems, derate or electrical issues.
• On-site diagnostics
• After-hours service available
• Fast response
• Serving Cincinnati, Dayton, Columbus & Northern Kentucky
Comprehensive electronic inspection before buying a used truck.
• Full ECM fault code scan
• Aftertreatment system check
• Engine data analysis
• Injector test
• Cylinder compression test
• Fuel system test
Why Choose MMS Diesel
Why Choose MMS Diesel
Professional Mobile Diesel Diagnostics & Repair
At MMS Diesel, we specialize in diagnosing and resolving complex electronic and mechanical issues in modern heavy-duty trucks. From ECM diagnostics and electrical troubleshooting to aftertreatment problems and roadside service, our goal is to identify the real issue quickly and get your truck back on the road.
We provide mobile on-site service, bringing professional diagnostic equipment and expertise directly to your truck — saving time, reducing downtime, and avoiding unnecessary towing.
What Sets MMS Diesel Apart
What Sets MMS Diesel Apart
Immediate Response – 24/7 Availability
Immediate Response – 24/7 Availability
Truck breakdowns don’t follow business hours. MMS Diesel provides fast response mobile service, including after-hours and emergency roadside diagnostics when you need help the most.
Advanced Diagnostics & Programming
Advanced Diagnostics & Programming
Modern trucks rely heavily on electronics and control modules. We use professional diagnostic software and tools to perform advanced troubleshooting, ECM programming, parameter changes, and system testing.
Electrical & Electronic Troubleshooting
Electrical & Electronic Troubleshooting
Electrical issues can be some of the hardest problems to diagnose. We specialize in wiring diagnostics, sensor testing, and electrical system troubleshooting to locate and repair faults efficiently.
Aftertreatment & Emissions System Diagnostics
Aftertreatment & Emissions System Diagnostics
Problems with DPF, SCR, DEF, and emissions systems can quickly lead to engine derates and downtime. We diagnose and perform forced regenerations, system tests, and aftertreatment troubleshooting to restore proper operation.
Pre-Purchase Truck Inspections
Pre-Purchase Truck Inspections
Buying a used truck can be risky. We offer comprehensive electronic inspections to identify hidden problems before you commit to a purchase.
Passion for Diesels
Passion for Diesels
Diesel diagnostics and electronics are not just a job for us — it’s something we are truly passionate about. We take pride in solving complex problems and providing reliable service that truck owners can trust.
Serving the Region
Serving the Region
Mobile service available in Cincinnati, Northern Kentucky, Dayton, and Columbus. Extended travel may include a trip fee depending on distance.
Truck Problem? We’re Ready to Help!
We respond fast to get your truck back on the road!
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