PACCAR MX P0473 is the fault-code chapter of the 2013 PACCAR MX Diagnostic Service Manual covering a pre-turbine air pressure under range fault, described as voltage too high or a short circuit to supply on ECU D420 pin C83. The page carries a full two-line description but no published diagnostic tree. Every field beneath the description, from technical data through to verification drive cycle, is answered by one 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 282 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
What the PACCAR MX P0473 chapter covers
- Both wordings PACCAR uses for the code, the plain-language one and the circuit-level one
- The pin identification that matters most here, ECU D420 pin C83
- 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 step sequence exists
- The single published action: contact the Engine Support Center
Diagnostic step sequence and verification
Inside PACCAR MX P0473 the procedure runs as follows. The page prints no sequence, but the pin reference gives you a start. The pressure before turbine chapter in the same manual identifies C83 as the signal line, with C61 as the power supply and C38 as ground, and it gives the 5 V key-on check at the harness connector. That circuit information is the practical route into a fault the code page itself does not develop.
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 the pre-turbine pressure sensor and VTG turbocharger. Model programmes and dealer support for these engines are listed on the PACCAR corporate site.
Who needs the PACCAR MX P0473 chapter
Technicians who pull this code alongside other turbine pressure faults need this page to confirm which pin is named, then work from the fuller pressure chapters in the same manual.
The complete PDF of the PACCAR MX P0473 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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