PACCAR MX P0192 is the fault code page for “Engine rail pressure – Voltage too low or short circuit to ground on ECU D420 pin A52” 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 P0192 as an engine rail pressure signal whose voltage is too low, or a short circuit to ground, on pin A52 of the D420 ECU. The page records the code as a 1 trip MIL fault with 3 drive cycle recovery, no readiness group, and a Fuel freeze frame type, so it lights the lamp on a single failed trip.
PACCAR MX P0192 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. The fault code information block does list 1 trip MIL, 3 drive cycle recovery, readiness group none, freeze frame type Fuel. Instead the page states: Please Contact the Engine Support Center. The footer gives the PACCAR Engine Support Call Center number, 1-800-477-0251.
- 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 | 180 |
| Pages | 1 |
| File size | 0.3 MB |
| Format | PDF, English |
Applies to PACCAR MX P0192 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 P0192 page
Technicians measuring the rail pressure signal circuit on a PACCAR MX engine who need the ECU pin and the lamp behaviour before they cut into the harness.
The full PDF page is in the DiagTechPro manuals library; a free account downloads it. Keep the PACCAR MX P0192 sheet open next to DAVIE.
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