The PACCAR MX P1196 page of the 2013 PACCAR MX Diagnostic Service Manual is the manufacturer reference for diagnostic trouble code P1196, described in the manual as “Engine rail pressure – Data erratic, intermittent, or incorrect at ignition on”. It is a 4-page PDF section covering common rail pressure diagnostics on EPA2013 PACCAR MX engines, and it keeps the same layout as every other code page in that manual.
Document details and coverage
| Brand | PACCAR |
| Model coverage | PACCAR MX engines, EPA2013 emissions |
| System group | DTCs / MX Engines (EPA2013) |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual |
| Fault code | P1196 |
| Subject | Common rail pressure |
| Pages | 4 |
| File size | 0.5 MB |
| Format | |
| Language | English |
What PACCAR MX P1196 means
The manual files P1196 as a 2 trip MIL code with 3 drive cycle recovery, readiness group None and freeze frame type Fuel. The diagnostic runs when the engine is not running, the ignition is keyed on after being off for more than 200 seconds and fuel temperature is more than 0°C [32°F]. The code sets when the PCI ECU (D420) detects that actual rail pressure is more than 140 bar [2030 psi], and it changes to inactive when the fault is no longer detected.
Possible causes and technical data
- Common rail pressure sensor deviation
The component and wiring check is made on the PCI ECU (D420) side with the ignition keyed off and connector F854 disconnected; the manual lists 5 V between the listed pins with the ignition keyed on. The rail pressure sensor is part of the common rail and is not supplied as a separate part. The page then runs 4 numbered troubleshooting steps, each with its own step ID, starting from a visual inspection of connectors and harness with the ignition off. The manual warns against back probing, notes that disconnecting the EAS connectors during troubleshooting produces multiple errors, and reminds the technician to exit the fault code menu in DAVIE and rerun the test before judging whether anything changed.
Who needs this PACCAR MX P1196 manual page
Heavy-duty technicians, fleet shops and independent workshops diagnosing Kenworth and Peterbilt trucks with EPA2013 PACCAR MX engines use this page to confirm what the ECU actually measured before parts are ordered. For engine literature, dealer locations and support contacts beyond this single code, start at the PACCAR corporate website.
The complete PACCAR MX P1196 extract from the 2013 PACCAR MX Diagnostic Service Manual is filed in the DiagTechPro manuals library, where the 4-page PDF can be viewed or downloaded with a free account.
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