Cummins ISX11.9 code 135 is the Cummins troubleshooting document for the Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Above Normal or Shorted to High Source fault (PID P100, SPN 100, FMI 3/3). The engine oil rifle pressure sensor is fed a 5 volt supply and a return by the ECM, and its signal voltage changes with the pressure in the oil rifle so the ECM can monitor lubricating oil pressure. It sets an amber warning lamp and lists the exact conditions, causes, and step-by-step checks a technician follows.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 |
| System / Group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault identifiers | PID P100, SPN 100, FMI 3/3 |
| Warning lamp | Amber |
| Pages | 16 |
| Format | |
| Language | English |
Document table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures and troubleshooting steps
Trucks covered by Cummins ISX11.9 code 135
This procedure applies to ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250. This is an official Cummins fault-code troubleshooting procedure, cleared and verified with the Cummins INSITE electronic service tool. It is set by an engine oil pressure signal voltage above 4.75 VDC for more than 16 seconds, and typical effects include no effect on performance, but a default oil pressure value is substituted and there is no engine protection for oil pressure. For engine specifications and dealer support, see the official Cummins website.
Who needs this Cummins ISX11.9 code 135 manual
Heavy-truck technicians, fleet maintenance teams, and workshop owners diagnosing this fault use it to confirm the code before replacing parts. During diagnosis the sensor is located on the left side of the engine block, and the fault is cleared by idling the engine for one minute and confirming an inactive status in Cummins INSITE. The diagnostic runs continuously with the keyswitch in the ON position, and the repair is validated by returning the code to inactive status.
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