This PACCAR MX P0262 fault manual is the official 2013 diagnostic service guide for common rail pump unit 1 voltage faults on PACCAR MX-series EPA 2013 engines. Published by PACCAR, this 5-page technical document provides step-by-step troubleshooting procedures and electrical specifications for mechanics diagnosing high-voltage or short-circuit conditions at ECU pin A25.
The PACCAR MX P0262 fault triggers when high-side voltage on the injector exceeds 80% of battery voltage during engine operation. This document includes wiring diagrams, component operation details, and a complete diagnostic workflow from visual inspection through component replacement.
Document details and specifications — PACCAR MX P0262
| Brand | PACCAR |
| Model coverage | MX-series engines (2013 EPA) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Table of contents
- Code number P0262 and fault code description
- Fault code information: MIL triggers and recovery cycles
- Description of common rail pump unit components and operation
- Control and rail pressure closed-loop system overview
- Location of components (L092 and L093 pump units)
- Diagnostic conditions and set/reset criteria
- Electrical diagram: wiring harness connector D420.A front view
- Technical data: resistance values at 20°C and 120°C
- Possible causes: faulty wiring, connectors, and solenoid valves
- Step-by-step diagnostic procedure (Steps 1–6, IDs 0262a–0262f)
- Verification and drive cycle test procedure
- Engine Support Call Center contact information
Applies to these models
This PACCAR MX P0262 fault guide applies exclusively to PACCAR MX-series diesel engines built to 2013 EPA emissions standards. It covers common rail pump unit 1 (L092) and related fuel system circuits on trucks using the PCI ECU platform. For official PACCAR engine documentation and support, visit PACCAR official website.
Who needs this MX P0262 fault manual
Heavy-duty diesel mechanics and workshop owners servicing PACCAR MX engines need this MX P0262 fault manual to diagnose and repair high-voltage faults in common rail pump units. The step-by-step diagnostics and electrical schematics enable rapid pinpointing of wiring, connector, and solenoid valve defects without guesswork.
The complete MX P0262 fault PDF is available in the DiagTechPro manuals library. A free account is required to download the full 5-page service manual.
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