This PACCAR MX EGR temperature diagnostic manual covers fault code P1030, a critical emission control diagnostic for 2013 PACCAR MX-series engines. Published by PACCAR as part of their comprehensive engine service documentation, this guide provides mechanics and technicians with step-by-step troubleshooting procedures, electrical schematics, and component specifications for diagnosing erratic or intermittent EGR temperature readings at engine start-up.
The PACCAR MX EGR temperature fault occurs when the ECU detects sensor deviation exceeding 3°C from averaged engine temperature readings following an 8-hour ignition-off period. This diagnostic ensures accurate EGR gas flow calculation and cooler performance monitoring on EPA 2013-compliant engines.
Document details and specifications — PACCAR MX EGR
| Brand | PACCAR |
| Model coverage | PACCAR MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Publication number | P1030 |
| Year/Revision | 2013 |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Table of contents
- Fault code P1030 description and diagnostic conditions
- Component location and system effect information
- Electrical diagrams and wiring harness connector pinouts (D420, F749)
- Technical data: EGR temperature sensor resistance specifications
- Component and circuit check procedures
- Step-by-step diagnostic troubleshooting (5 steps)
- Verification drive cycle procedure
Applies to these models
This PACCAR MX EGR temperature diagnostic applies exclusively to 2013 PACCAR MX-series diesel engines compliant with EPA 2013 emission standards. The fault code P1030 specifically relates to the EGR temperature sensor (component F749) circuit and the PCI ECU (D420) that monitors gas flow temperature after the EGR cooler on medium and heavy-duty trucks equipped with PACCAR powerplants. Refer to PACCAR official website for engine application details.
Who needs this MX EGR temperature manual
Diesel engine mechanics, heavy-duty truck technicians, and workshop owners servicing PACCAR MX-powered vehicles require this MX EGR temperature diagnostic reference to accurately diagnose and resolve fault code P1030. The manual is essential for technicians performing emission-related repairs and conducting post-repair verification tests using DAVIE diagnostic software.
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