PACCAR MX engine P1195 identifies this official workshop document.
This is the 2013 PACCAR MX Diagnostic Service Manual covering fault code P1195, engine rail pressure data erratic, intermittent, or incorrect at ignition on. Published by PACCAR for MX-series diesel engines compliant with EPA 2013 emissions standards, this technical document provides mechanics and workshop technicians with comprehensive diagnostic procedures and electrical component specifications.
The PACCAR MX engine P1195 indicates that the PCI ECU (D420) has detected actual rail pressure exceeding 245 bar (3553 psi) during the ignition-on diagnostic cycle. This fault triggers a 2-trip MIL with 3 drive cycle recovery and belongs to the fuel system freeze frame category. The diagnostic runs only when the engine is not running, ignition is keyed on after being off for more than 200 seconds, and fuel temperature exceeds 0°C (32°F).
Document details and specifications — PACCAR MX engine
| Brand | PACCAR |
| Model coverage | MX-series engines |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication number | P1195 |
| Year/Revision | 2013 |
| Pages | 4 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Table of contents
- Fault code description and information
- Component description: common rail pressure sensor
- Diagnostic condition and set/reset criteria
- Electrical diagrams and wiring harness connectors (D420, F854)
- Technical data and component/wiring checks
- Step-by-step diagnostic troubleshooting procedure
- Verification and drive cycle validation
Applies to these models
This PACCAR MX engine P1195 manual applies to 2013 PACCAR MX-series diesel engines equipped with common rail fuel injection systems and PCI ECU (D420) electronic control units. The rail pressure sensor (F854) is integrated into the common rail assembly and is not separately serviceable. For official PACCAR engine documentation and support, visit PACCAR official website.
Who needs this MX engine P1195 manual
This diagnostic service manual is essential for heavy-duty diesel mechanics, workshop owners, and technicians servicing PACCAR MX-powered trucks. The MX engine P1195 troubleshooting guide provides the electrical specifications, connector pinouts, and step-by-step repair procedures required to diagnose and resolve rail pressure sensor faults efficiently.
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