This PACCAR MX engine P1284 document is the official 2013 diagnostic service manual excerpt covering the AMF CAN sensor medium temperature out of range fault. Published by PACCAR for their EPA 2013-compliant MX engine platform, this reference guides technicians through fault identification, component location, and diagnostic procedures.
The P1284 code is a critical emissions-related diagnostic trouble code that requires systematic troubleshooting to isolate temperature sensor faults in the aftertreatment fluid management system.
Document details and specifications — PACCAR MX engine
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Year/Revision | 2013 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Table of contents
- Code number P1284
- Fault code description: AMF CAN sensor medium temperature out of range
- 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
This manual applies to PACCAR MX engines compliant with EPA 2013 emissions standards. The P1284 code specifically addresses the aftertreatment fluid management (AMF) CAN sensor temperature monitoring circuit across the MX engine platform used in medium and heavy-duty trucks. For more information, visit PACCAR official.
Who needs this PACCAR MX engine P1284 manual
Diesel mechanics, diagnostic technicians, and workshop owners servicing PACCAR MX-equipped trucks require this guide to accurately diagnose and resolve the P1284 AMF CAN sensor medium temperature out of range fault. The manual provides essential electrical diagrams, technical specifications, and step-by-step diagnostic procedures to identify root causes and implement correct repairs.
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