This document is the PACCAR MX P1042 diagnostic reference manual, a comprehensive troubleshooting guide for the VTG turbocharger control system unable to reach target condition. Published by PACCAR as part of the 2013 MX Diagnostic Service Manual, it covers EPA 2013 engines and provides technicians with detailed diagnostic procedures, electrical schematics, and step-by-step repair sequences for this fault code.
Document details and specifications — PACCAR MX P1042
| Brand | PACCAR |
| Model coverage | PACCAR MX Engines |
| System/Group | DTCs / MX Engines (EPA2013) |
| Publication number | P1042 |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Table of contents
- Code number and fault code description
- Fault code information (trip MIL and recovery cycles)
- Description of component(s) – VTG turbocharger sensor and exhaust gas pressure measurement
- Location of component(s)
- Diagnostic condition – engine speed and mode requirements
- Set and reset conditions of fault code
- Electrical diagram(s) – Wiring harness connectors D420.C and F826
- Technical data – pin configuration and values
- Possible causes – leaking exhaust system, pressure sensor deviation
- Additional information – VTG turbocharger actuator and sensor details
- Diagnostic step-by-step troubleshooting procedure (Steps 1–5)
- Verification drive cycle for repair validation
Applies to these models
This PACCAR MX P1042 diagnostic guide applies to 2013 PACCAR MX diesel engines equipped with VTG (Variable Turbine Geometry) turbocharger systems and EPA 2013 emissions compliance. It covers vehicles using the PCI ECU (D420) engine control unit and the pressure sensor before turbine (F826) component. For official PACCAR engine documentation and support, visit PACCAR official website.
Who needs this MX P1042 diagnostic manual
Diesel engine mechanics, heavy truck technicians, and workshop owners working on PACCAR MX powered trucks need this MX P1042 diagnostic reference. The manual is essential for diagnosing and repairing VTG turbocharger control faults, particularly when the system cannot reach target boost pressure or exhaust gas pressure levels.
The complete MX P1042 diagnostic PDF is available in the DiagTechPro manuals library. Free account registration is required to download.
Related manuals library
