International Diesel Diagnostic Specialists
Expert remote diagnostics for MaxxForce and A26 engines. Comprehensive Navistar/International support from diesel diagnostic technicians.
Engines We Support
MaxxForce DT
Medium-duty workhorse engine for International DuraStar/4300 series. Known EGR cooler challenges with proven diagnostic solutions.
MaxxForce 13
12.4L heavy-duty engine with advanced EGR system. Found in ProStar and LoneStar models requiring specialized diagnostics.
MaxxForce 15
MaxxForce 15 support requires the exact engine identification and corresponding International service information; do not substitute another manufacturer’s procedure.
A26
A26 engine applications must be identified by model year and calibration. International documented EGR air-management changes for the 2021 A26; do not describe the whole family as SCR-only.
N13
12.4L transitional engine bridging MaxxForce 13 to A26 technology. SCR aftertreatment with Cummins-derived components.
Common International Issues We Solve
EGR Cooler Failures (MaxxForce)
Notorious MaxxForce EGR cooler cracking and coolant loss. Diagnostic procedures, leak testing, and replacement guidance.
Aftertreatment Problems
SCR efficiency derates, DPF regeneration failures, and DOC degradation across MaxxForce and A26 platforms.
High-Pressure Fuel Pump
HPFP failures causing low rail pressure, hard starts, and power loss. Common on MaxxForce DT and 13 engines.
DPF Regeneration Issues
Failed forced regen attempts, high soot load conditions, and HC doser problems preventing successful DPF cleaning cycles.
SCR System Failures
DEF dosing unit problems, NOx sensor faults, and SCR catalyst efficiency issues causing progressive derate conditions.
Our International Diagnostic Services
Remote Diagnostics
Confirm the applicable International diagnostic application and access by engine generation. SDS, ServiceMaxx and chassis/body software do not have interchangeable coverage.
ECM Programming
Remote ECM calibration updates, parameter changes, and module replacement programming for International/Navistar engines.
Bench Harness Testing
International-specific bench harness for ECM and module testing. Isolate electrical faults efficiently outside the vehicle.
Training & Support
International/Navistar diagnostic training covering MaxxForce-specific issues, A26 systems, and ServiceMaxx software operation.
Recommended Tools
International Bench Harness
Dedicated bench testing harness for International/Navistar ECMs. Test MaxxForce and A26 modules outside the vehicle.
Nexiq USB-Link 3
Confirm the exact International software application, adapter version and required vehicle connection before choosing an interface.
International Resources
Need International Diagnostic Help?
Our diagnostic technicians are available for remote diagnostics and expert International engine support.
Contact Us Now Call (800) 697-7626Other Engine Platforms We Support
Cummins
ISX15, X15, ISB 6.7, and ISL engine diagnostics. ECM programming, aftertreatment repair, and INSITE remote 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.
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.