This document is the PACCAR MX air temperature code P1128 reference manual from the 2013 PACCAR MX Diagnostic Service Manual. Published by PACCAR for technicians and workshop owners servicing PACCAR MX engines, it provides official fault code identification and diagnostic procedures for air temperature system faults.
The manual covers the specific diagnostic code P1128, which flags an air temperature condition that is too high, and directs users to the Engine Support Center for detailed troubleshooting assistance.
Document details and specifications — PACCAR MX air
| Brand | PACCAR |
| Model coverage | PACCAR MX Engines |
| System/Group | DTCs / MX Engines (EPA 2013) |
| Publication no. | Not specified in extract |
| Year/Revision | 2013 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Table of contents
- Code number P1128
- Fault code description (Air temp too high)
- 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 PACCAR MX air temperature reference applies specifically to 2013 PACCAR MX engines built to EPA 2013 emissions standards. The manual guides technicians through fault code P1128 diagnosis on affected PACCAR MX powertrains. For additional engine support and technical resources, visit PACCAR official.
Who needs this MX air temperature manual
This MX air temperature code guide is essential for certified diesel mechanics and workshop managers diagnosing temperature sensor faults and air intake system issues on PACCAR MX engines. Technicians troubleshooting code P1128 will find fault descriptions, component locations, and step-by-step diagnostic procedures in this reference.
The complete MX air temperature manual is available in the DiagTechPro manuals library. A free account is required to download this PDF document.
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Using this document effectively
Use PACCAR MX air temperature Code P1128 — 2013 EPA Service as a reference alongside the exact machine identification, engine family, control module, and publication revision shown on the equipment. Confirm that the model and production range match before following any table, connector view, test sequence, or specification. Record the original fault code and operating conditions before clearing codes or disconnecting components.
