This is the official PACCAR MX P0563 diagnostic reference manual for 2013 EPA 2013 MX engines. Published by PACCAR, this document provides comprehensive troubleshooting procedures for the ECU PCI power supply fault condition. The PACCAR MX P0563 diagnostic indicates that the ECU power supply voltage is too high on PCI pins B60, B61, or B62, and covers both diagnostic identification and step-by-step repair workflows.
Mechanics and workshop owners who service PACCAR MX engines will find this resource essential for rapid fault code resolution and system diagnostics.
Document details and specifications — PACCAR MX P0563
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | 2013 PACCAR MX Diagnostic Service Manual |
| Year/Revision | 2013 |
| Pages | 2 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Table of contents
- Code number P0563
- Fault code description: ECU PCI power supply – Data valid but too high on ECU D420 pin B60, B61, or B62
- Fault code information: 1 trip MIL, 3 drive cycle recovery
- Description and location of components
- Diagnostic condition
- Set and reset conditions
- Possible causes
- Additional information
- Diagnostic step-by-step troubleshooting
- Verification drive cycle procedure
Applies to these models
The PACCAR MX P0563 diagnostic manual applies to PACCAR MX engines compliant with EPA 2013 emissions standards. This diagnostic code runs continuously when the ignition is on and is specific to internal PCI power supply issues on the ECU D420 component. For official PACCAR technical support and engine specifications, visit PACCAR official.
Who needs this MX P0563 diagnostic manual
This MX P0563 diagnostic guide is essential for diesel mechanics, truck technicians, and workshop owners who diagnose and repair PACCAR MX-equipped trucks. The manual provides the diagnostic framework needed to isolate power supply faults and determine when PCI replacement is necessary, supporting faster turnaround times and accurate fault resolution.
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