This document is a pressure sensor DTCs troubleshooting procedure for Fault Code 141. It explains the Engine Oil Rifle Pressure 1 Sensor Circuit fault, its code reason, ECM response, clearing conditions, and guided electrical checks using INSITE™.
Official pressure sensor DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250 (2010-12) / DTCs; extract also lists ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250, ISL8.9 CM2150 SN, ISM11 CM876 SN, and ISZ13 CM2150 in associated procedures. |
| System/Group | DTCs; Engine Oil Rifle Pressure 1 Sensor Circuit – Voltage Below Normal or Shorted to Low Source |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 30-Dec-2010 |
| Pages | 17 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 141
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the oil pressure sensor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
The file is indexed by DiagTechPro under Cummins ISB6.7 CM2250 (2010-12) DTCs, while the extract’s associated procedure tables also reference ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSB6.7 CM2250, QSL9 CM2250, GX CM2250, ISL8.9 CM2150 SN, ISM11 CM876 SN, and ISZ13 CM2150. The fault applies to the Engine Oil Rifle Pressure 1 Sensor Circuit and supports diagnosis of low signal voltage or an open circuit detected at the engine oil pressure circuit. For official manufacturer information, visit Cummins official website.
Who needs this pressure sensor DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this pressure sensor DTCs manual when diagnosing Fault Code 141, PID P0522, SPN 100, FMI 4/4. The procedure is useful when checking sensor supply faults, connector pins, 4.75 to 5.25-VDC supply readings, circuit response with a jumper wire, ECM connector condition, ECM calibration, and fault clearing with INSITE™.
The document states that the ECM provides a 5 volt supply and sensor return for the engine oil pressure sensor, which sends a pressure-based signal from the oil rifle pressure circuit. Fault Code 141 sets when the ECM detects engine oil pressure signal voltage below 0.25-VDC for more than 16 seconds. The amber CHECK ENGINE light illuminates immediately when the diagnostic runs and fails, and a default value is used for engine oil pressure reading. The document also warns that there is no performance effect, but no engine protection for oil pressure.
Repair validation requires starting the engine and letting it idle for 1 minute. INSITE™ changes the fault status to inactive after the diagnostic runs and passes, and the amber CHECK ENGINE lamp turns off after a pass. For OBD engines, the MIL turns off after three consecutive trips where the diagnostic runs and passes. The “Reset All Faults” command in INSITE™ can clear active and inactive faults and extinguish the MIL for OBD engines.
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