Cummins Diesel Diagnostic Experts
Comprehensive remote diagnostics and support for ISX15, X15, ISB 6.7, ISL, and QSX engines. Factory-level troubleshooting from diagnostic technicians.
Engines We Support
ISX15 / X15
CM2350 & CM2450 platforms. The workhorse of long-haul trucking with advanced aftertreatment systems.
ISB 6.7
Medium-duty powerhouse found in RAM trucks and medium-duty applications. CM2350 electronics.
ISL 8.9
Versatile mid-range engine for vocational trucks, buses, and RV applications.
QSX
Heavy-duty industrial and construction applications with robust diagnostic requirements.
CM2350 / CM2450 ECMs
Advanced engine control modules requiring specialized diagnostic tools and software for programming and calibration.
Common Cummins Issues We Solve
Aftertreatment Derates
Diagnose and resolve 5 MPH and 25% derate conditions caused by SCR efficiency, DEF quality, and sensor failures across all Cummins platforms.
SCR Efficiency Codes
SPN 4364/4365 SCR conversion efficiency problems including NOx sensor drift, DEF dosing issues, and catalyst degradation.
DEF Quality Issues
DEF concentration faults, crystallization in dosing valves, tank heater failures, and quality sensor diagnostics.
DPF Regen Failures
Failed or incomplete DPF regeneration events, high soot load conditions, and 7th injector/DOC temperature problems.
Injector Problems
Cylinder contribution imbalances, injector quantity adjustments, return flow testing, and replacement programming.
EGR Valve Failures
EGR valve sticking, actuator faults, and cooler efficiency problems causing performance derates and increased emissions.
Our Cummins Diagnostic Services
Remote Diagnostics
Connect with our Cummins specialists via Nexiq USB-Link for real-time fault code analysis, data monitoring, and guided troubleshooting.
ECM Programming
Remote ECM calibration updates, parameter changes, injector trim codes, and DPF reset procedures for all Cummins platforms.
Bench Harness Testing
Use our Cummins-specific bench harness to test ECMs, sensors, and actuators outside the vehicle for accurate diagnostics.
Training & Certification
Hands-on and remote training programs covering Cummins aftertreatment systems, fault code diagnosis, and advanced troubleshooting techniques.
Recommended Tools
Cummins Bench Harness
Purpose-built bench testing harness for Cummins CM2350 and CM2450 ECMs. Test modules outside the vehicle for faster, more accurate diagnostics.
Nexiq USB-Link 3
Industry-standard RP1210 diagnostic adapter for connecting to Cummins INSITE and remote diagnostic sessions. Essential for any diesel shop.
Cummins Resources
Need Cummins Diagnostic Help?
Our diagnostic technicians are available for remote diagnostics and expert Cummins engine support.
Contact Us Now Call (800) 697-7626Other Engine Platforms We Support
Detroit Diesel
DD13, DD15, DD16 diagnostics. MCM/CPC troubleshooting, turbo actuator calibration, and one-box aftertreatment repair.
PACCAR
MX-13 and MX-11 engine support for Kenworth and Peterbilt. Davie4 diagnostics, HC doser repair, and ECM programming.
International / Navistar
MaxxForce and A26 engine diagnostics. EGR cooler repair, ServiceMaxx support, and aftertreatment troubleshooting.
Application and service references
Confirm engine serial, controller, model year, software and task before scheduling. These documents do not establish a Torque Edge credential or universal vehicle coverage.
ECM and module programming
Replacing a controller, updating an approved calibration or changing a supported parameter? Send the engine and module details for an assessment.