This MX engine fault codes document is a diagnostic service reference manual for mechanics and workshop technicians troubleshooting code P1285. Published by PACCAR for 2013 EPA-compliant MX engines, it provides the essential diagnostic framework mechanics need when an AMF CAN sensor checksum error is detected in the vehicle’s fault code memory.
The manual focuses specifically on fault code P1285 and includes structured diagnostic procedures, component location information, and electrical data required to resolve AMF sensor communication faults on PACCAR-powered trucks.
Document details and specifications — MX engine fault
| 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 P1285
- Fault code description: AMF CAN sensor checksum error
- 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 MX engine fault codes manual applies to all PACCAR MX-series engines compliant with EPA 2013 emissions standards. It is designed for technicians diagnosing P1285 code faults on heavy-duty trucks equipped with PACCAR powerplants. For comprehensive engine support and technical resources, visit PACCAR official site.
Who needs this engine fault codes manual
Diesel mechanics, truck workshop owners, and service technicians working on PACCAR MX-powered vehicles need this engine fault codes reference when diagnosing and repairing P1285 AMF CAN sensor checksum errors. The manual provides the step-by-step diagnostic procedures and electrical information required to pinpoint root causes and verify repairs through verification drive cycle testing.
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