PACCAR Diesel Diagnostic Experts
Specialized remote diagnostics for PACCAR MX-13 and MX-11 engines. Expert support for Kenworth and Peterbilt trucks from diagnostic technicians.
Engines We Support
MX-13
12.9L flagship engine powering Kenworth T680/W990 and Peterbilt 579/567. Advanced common rail fuel system.
MX-11
10.8L medium-bore engine for regional haul. Lighter weight with excellent fuel efficiency for Kenworth and Peterbilt models.
PX-7
6.7L medium-duty engine for Kenworth and Peterbilt medium-duty trucks. Cummins-based platform with PACCAR integration.
PX-9
8.9L vocational engine bridging medium and heavy-duty applications. Found in refuse, construction, and regional haul.
Common PACCAR Issues We Solve
HC Doser Coking
Hydrocarbon doser (7th injector) coking and failure causing DPF regeneration problems, high soot loads, and derate conditions.
DPF Soot Loading
Excessive soot accumulation from incomplete regeneration cycles, failed HC dosers, and DOC efficiency degradation.
DEF Dosing Unit
DEF dosing valve crystallization, pump failures, and line heater issues causing SCR efficiency derates and NOx faults.
Turbo VGT Issues
Variable geometry turbocharger actuator calibration, sticking vanes, and position sensor faults affecting engine performance.
EGR System Problems
EGR valve carbon buildup, cooler efficiency loss, and actuator failures leading to emissions and performance derates.
Our PACCAR Diagnostic Services
Remote Diagnostics
Live remote sessions using Davie4 for real-time PACCAR MX-13/MX-11 fault code analysis, data monitoring, and guided repair procedures.
ECM Programming
Remote ECM calibration updates, parameter adjustments, injector coding, and aftertreatment reset procedures for PACCAR engines.
Bench Harness Testing
PACCAR-specific bench harness for ECM module testing outside the vehicle. Fast, accurate fault isolation for MX-series engines.
Training & Support
PACCAR diagnostic training covering Davie4 software, aftertreatment systems, and common MX-13/MX-11 failure patterns.
Recommended Tools
PACCAR Bench Harness
Purpose-built bench testing harness for PACCAR MX-series ECMs. Test and diagnose modules efficiently outside the vehicle.
Nexiq USB-Link 3
Confirm interface approval for the exact PACCAR diagnostic software, vehicle and task; RP1210 support alone does not establish compatibility.
PACCAR Resources
Need PACCAR Diagnostic Help?
Our diagnostic technicians are available for remote diagnostics and expert PACCAR 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.
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.