PACCAR MX P047C is the fault-code chapter of the 2013 PACCAR MX Diagnostic Service Manual covering an air pressure post-BPV under range fault, meaning the pressure measured after the back pressure valve reads below its expected window. The page is a single-sheet reference entry with no published troubleshooting tree. Every field beneath the description, from diagnostic condition through to verification drive cycle, carries the same instruction: contact the Engine Support Center.
Document details at a glance
| Brand | PACCAR |
|---|---|
| Model coverage | PACCAR MX engines, EPA 2013 emissions level |
| System group | DTCs, MX Engines EPA2013 |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual, page 283 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
What the PACCAR MX P047C chapter covers
- The exact wording PACCAR uses for the under range condition, for matching a DAVIE readout
- Its pairing with the over range code that sits on the following page
- Confirmation that no diagnostic or set condition is published
- Confirmation that no wiring diagram or technical data table is printed
- Confirmation that no possible-cause list or numbered procedure exists
- The single published action: contact the Engine Support Center
Diagnostic step sequence and verification
Inside PACCAR MX P047C the procedure runs as follows. No sequence is printed, so the useful reading is sideways. The BPV valve is one of the four functions driven by the pre-turbine pressure signal in the same manual, alongside the VTG turbocharger, EGR flow and the engine brake, which is why a pressure complaint here rarely stays isolated. Work the pressure sensor chapters that do carry pin data before calling for support.
Trucks and engines it applies to
The entry belongs to the EPA 2013 PACCAR MX code set in Kenworth and Peterbilt trucks, on engines fitted with a back pressure valve in the exhaust path. Model programmes and dealer support for these engines are listed on the PACCAR corporate site.
Who needs the PACCAR MX P047C chapter
Technicians seeing engine brake or exhaust pressure complaints need this page to confirm the code exists as a bare entry, so no time is lost hunting for a procedure PACCAR never printed.
The complete PDF of the PACCAR MX P047C chapter is filed in the DiagTechPro manuals library, where a free account is required to download it alongside the rest of the MX Engines EPA2013 fault-code set.
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