Our Services

MMS Diesel provides mobile heavy-duty truck diagnostics, electrical troubleshooting, and on-site repair services for owner-operators and commercial fleets.

Our goal is to quickly identify complex electronic and engine management problems and minimize downtime by repairing trucks directly on-site whenever possible.

Using professional diagnostic software and tools, we are able to perform many of the same tests and procedures that normally require a dealership visit — saving time and reducing costly downtime

ECM Diagnostics & Programming

Modern heavy-duty trucks rely on complex electronic systems to manage engine performance, emissions systems, and safety functions. When faults occur, proper diagnostics are critical.

MMS Diesel provides dealer-level ECM diagnostics using professional software such as Detroit Diesel DiagnosticLink (DDDL), Cummins INSITE, etc.

Our ECM diagnostic services include but not limits to:

• Fault code diagnostics and troubleshooting
• ECM communication diagnostics
• Engine derate troubleshooting
• Sensor and actuator diagnostics
• Electrical system testing
• ECM parameter changes, programming, flashing, etc
• Performance and system data analysis

We focus on accurately identifying the root cause of problems, not just clearing codes.Anything that we can get to through a computer - we can fix

Aftertreatment & Forced Regeneration

Aftertreatment systems such as DPF, SCR, and DEF systems are one of the most common causes of derates and downtime in modern trucks.

We provide diagnostics and repair for trucks experiencing emissions-related problems.

Services include but not limits to:

• DPF and SCR system diagnostics
• DEF system troubleshooting
• Parked DPF regeneration
• Forced regeneration procedures
• Aftertreatment sensor diagnostics
• SCR efficiency troubleshooting
• 5-hour SCR regen procedures when required

If your truck is stuck in derate or unable to complete a regen, we can diagnose the issue and perform the necessary procedures on site.

Electrical Diagnostics & Repair

Electrical problems can be some of the most difficult issues to diagnose in modern trucks.

MMS Diesel specializes in advanced electrical troubleshooting and wiring repair, helping identify problems that may otherwise require extensive dealership diagnostics.

Electrical services include but not limits to:

• Wiring harness diagnostics and repair
• Sensor circuit diagnostics
• Short circuits and open circuit troubleshooting
• CAN communication diagnostics
• Voltage drop testing
• Electrical component testing and replacement

Our goal is to quickly isolate electrical faults and repair them properly, preventing repeated breakdowns.

Emergency Mobile Truck Service

Breakdowns and engine derates can happen anytime, and getting a truck back on the road quickly is critical.

MMS Diesel provides 24/7 emergency mobile diagnostics and roadside service.

Emergency services include but not limits to:

• Mobile on-site diagnostics
• Derate troubleshooting
• Electrical issue diagnostics
• Aftertreatment troubleshooting
• Regeneration procedures
• Sensor and wiring repairs

We respond quickly to minimize downtime and help trucks return to service as soon as possible.

Fleet Diagnostics & Maintenance Support

MMS Diesel also works with commercial fleets and trucking companies to help keep trucks operating reliably.

Fleet services include:

• On-site diagnostics for multiple trucks
• Electrical troubleshooting for recurring issues
• Aftertreatment system diagnostics
• Preventative diagnostics checks
• Mobile service at fleet yards or job sites
• Priority scheduling for fleet customers

Working with a mobile diagnostic specialist allows fleets to reduce downtime and avoid unnecessary dealership visits.

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