The PACCAR MX U1011 diagnostic addresses CAN communication hardware or software faults affecting the E-CAN bus in 2013 PACCAR MX engines. Published by PACCAR, this 22-page service manual provides detailed troubleshooting and component diagnostic procedures for mechanics and workshop technicians working on heavy-duty diesel truck engines subject to EPA 2013 emissions standards.
Code U1011 triggers one MIL illumination and one Stop Engine lamp activation per trip, requiring three drive cycles for recovery. This comprehensive fault documentation covers all E-CAN networked components including the humidity sensor, EGR valve module, backpressure valve, and VTG turbo charger actuator.
Document details and specifications — PACCAR MX U1011
| Brand | PACCAR |
| Model coverage | MX Engines (2013) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Year/Revision | 2013 |
| Pages | 22 |
| File size | 1.3 MB |
| Format | |
| Language | English |
Table of contents
- Code number and fault code description
- Component descriptions: Humidity Sensor (F852), EGR Valve Module (L095), Backpressure Valve (L096), VTG Turbo Charger Actuator (L037)
- Inlet air humidity, temperature, and pressure measurement effects
- EGR valve control systems and fail-safe positions
- Backpressure valve operation and E-CAN communication
- Diagnostic conditions and fault code set/reset criteria
- Electrical diagrams for E-CAN components
- Component and wiring check procedures
- Step-by-step troubleshooting workflow
- Repair verification cycles and DAVIE diagnostics
- PACCAR Engine Support Center contact information
Applies to these models
This manual applies exclusively to 2013 PACCAR MX diesel engines with E-CAN architecture, specifically addressing the PACCAR MX U1011 diagnostic related to E-CAN communication faults. The troubleshooting procedures cover sensors and actuators in the fuel injection, emissions control, and turbocharger systems regulated under EPA 2013 standards. For detailed information about PACCAR engines and support resources, visit PACCAR official website.
Who needs this PACCAR MX U1011 diagnostic guide
Diesel engine technicians, workshop owners, and fleet maintenance managers need this MX U1011 diagnostic guide when diagnosing E-CAN communication failures affecting emissions-controlled heavy trucks. The manual is essential for shops equipped with DAVIE diagnostic software performing systematic fault isolation on humidity sensors, EGR modules, and turbocharger actuators.
The complete MX U1011 diagnostic manual is available in the DiagTechPro manuals library. A free account is required to download the full 22-page PDF document.
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