This Cummins crankcase pressure sensor document is a troubleshooting procedure for Fault Code 1942 on CM2150 engines. It explains the crankcase pressure circuit, diagnostic conditions, active amber CHECK ENGINE lamp behavior, and guided tests using INSITE™ electronic service tool. The file is supplied as Code 1942.pdf for workshop reference.
Official Cummins crankcase pressure sensor document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, ISL CM2150; file listing notes ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Crankcase Pressure Sensor; Fault Code 1942 |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 12 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 1942 — Crankcase Pressure – Data Erratic, Intermittent, or Incorrect
- 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 for sensor circuit fault codes.
- Guided Step 2 – Check the crankcase 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
This procedure applies to Cummins ISB, ISC, and ISL CM2150 engine applications referenced in the extract, including the file group listing for ISB6.7 CM2150 (2007-09). The document also references ISB CM2100 and CM2150 Service Manual Bulletin 4021578, and ISC and ISL CM2150 Service Manual Bulletin 4021569, for related crankcase breather hose and component procedures. It covers engines where the ECM supplies a 5 volt reference to the crankcase pressure sensor and monitors the signal circuit to calculate crankcase air pressure. For official engine information, visit Cummins official website.
Who needs this Cummins crankcase pressure sensor manual
Mechanics, fleet technicians, and workshop owners need this crankcase pressure sensor manual when diagnosing Fault Code 1942, PID P101, SPN 101, FMI 2. It is useful when checking Fault Codes 1843 and 1844, crankcase breather hose connection, dirty or damaged connector pins, sensor response, ECM connector response, engine harness resistance or short circuits, ECM calibration revision history, and final fault clearing.
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