This is the official PACCAR MX P1266 diagnostic manual, a single-page service document published by PACCAR for their 2013 EPA-compliant MX engine line. The PACCAR MX P1266 code addresses combustion imbalance detection in cylinder 2 relative to other cylinders, providing technicians with structured fault diagnosis procedures.
Published as part of the 2013 PACCAR MX Diagnostic Service Manual, this resource is designed for shop-level diagnostics of heavy-duty truck engines. It covers fault identification, component location, electrical diagrams, and step-by-step verification procedures required to resolve the combustion imbalance condition.
Document details and specifications — PACCAR MX P1266
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines |
| Year/Revision | 2013 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Table of contents
- Code number P1266
- Fault code description
- Fault code information
- Description of component(s)
- Location of component(s)
- Diagnostic condition
- Set condition of fault code
- Reset condition of fault code
- Electrical diagram(s)
- Technical data
- Possible causes
- Additional information
- Diagnostic Step-by-Step
- Verification Drive Cycle
Applies to these models
The PACCAR MX P1266 manual applies to PACCAR MX engines manufactured under EPA 2013 emissions standards. Technicians working on PACCAR heavy-duty trucks equipped with MX-series engines will use this code reference during diagnostic troubleshooting. For official PACCAR engine and truck information, visit PACCAR official.
Who needs this PACCAR MX P1266 diagnostic manual
Diesel mechanics and workshop owners diagnosing combustion imbalance faults on PACCAR MX engines require the PACCAR MX P1266 code documentation. This manual is essential for technicians performing electrical and mechanical diagnostics, fault code interpretation, and verification drive cycles on EPA 2013 PACCAR truck engines.
The complete MX P1266 diagnostic PDF is available in the DiagTechPro manuals library. A free account is required to download the full document.
Related manuals library
