PACCAR MX P0113 is the fault code page for “Boost temperature – Voltage too high or short circuit to supply on ECU D420 pin A43” in the 2013 PACCAR MX Diagnostic Service Manual. PACCAR publishes it for engines in the EPA 2013 emissions family, and it is worked with the DAVIE diagnostic software.
What this fault code means
The manual describes P0113 as a boost temperature signal whose voltage is too high, or a short circuit to supply, on pin A43 of the D420 ECU. Naming the exact ECU pin is what makes the page useful: it tells you which circuit in the engine harness to break out and measure first.
PACCAR MX P0113 page structure
This is a one-page entry. It carries the code number and the fault code description, then the standard headings used throughout the manual, but the detail under them is not printed on this page. Instead the page states: Please Contact the Engine Support Center.
- Description and location of component
- Diagnostic condition, set condition and reset condition
- Electrical diagrams and technical data
- Possible causes and additional information
- Diagnostic step-by-step and verification drive cycle
Treat the page as a confirmed identification of the code plus an instruction on where the full procedure lives. That is still worth having in writing when a customer asks why the shop is calling the factory.
Document details and format
| Field | Value |
|---|---|
| Brand | PACCAR |
| System group | DTCs, MX Engines (EPA2013) |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual |
| Manual page | 125 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | PDF, English |
Applies to PACCAR MX P0113 repairs
The page sits in the DTCs section for MX engines built to the EPA 2013 emissions standard, so it covers trucks running that engine family with the PCI engine control unit. Coverage and dealer support are published on the PACCAR corporate site.
Who needs this PACCAR MX P0113 page
Technicians tracing a boost temperature circuit on a PACCAR MX engine who need the ECU pin reference before they open the D420 connector.
The full PDF page is in the DiagTechPro manuals library; a free account downloads it. Keep the PACCAR MX P0113 sheet open next to DAVIE.
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