This is the official PACCAR MX P1039 pressure BPV diagnostic service manual for 2013 EPA-compliant MX engines. Published by PACCAR, this document provides mechanics and workshop owners with complete troubleshooting procedures, electrical diagrams, and step-by-step repair guidance for the P1039 fault code related to exhaust gas pressure measurement after the BPV (backpressure valve).
Document details and specifications — PACCAR MX P1039
| Brand | PACCAR |
| Model coverage | MX Engines (EPA 2013) |
| System/Group | DTCs / MX Engines (EPA2013) |
| Publication no. | P1039 |
| Year/Revision | 2013 |
| Pages | 6 |
| File size | 0.7 MB |
| Format | |
| Language | English |
Table of contents
- Fault code P1039 description and information
- Description of pressure sensor after BPV (F823) component
- Effect on system and NOx sensor correction
- Location of components
- Diagnostic conditions and fault trigger thresholds
- Electrical diagrams and wiring harness connector pinouts
- Technical data and component checks for ECU (D420)
- Step-by-step diagnostic troubleshooting procedure
- Visual inspection: DOC inlet and after BPV pressure sensor
- Component replacement and fault re-verification
- Verification drive cycle for repair validation
Applies to these models
This PACCAR MX P1039 pressure BPV diagnostic manual applies to PACCAR MX diesel engines meeting EPA 2013 emissions standards. It covers trucks equipped with the pressure sensor after BPV (sensor F823) and addresses fault code P1039, which indicates data valid but excessive pressure reading after the backpressure valve. For official PACCAR engine specifications and technical support, visit PACCAR official website.
Who needs this MX P1039 pressure BPV manual
Diesel truck mechanics, workshop technicians, and fleet maintenance managers diagnosing the MX P1039 pressure BPV fault code need this reference. The manual enables rapid electrical troubleshooting, sensor testing, and component replacement without guesswork, reducing diagnostic time and ensuring accurate repair procedures compliant with EPA 2013 standards.
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