This Cummins 3142 fault code document is a troubleshooting PDF for the aftertreatment SCR intake temperature sensor circuit. It explains voltage-above-normal diagnostics, connector checks, harness tests, interface module checks, ECM calibration review, and fault-code clearing with INSITE™ electronic service tool.
Official Cummins 3142 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250 in associated procedures. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment SCR Intake Temperature Sensor Circuit |
| Publication no. | Associated bulletin numbers shown: 4022254, 4022257, 4022250, 2883445 |
| Year/Revision | Year unknown; last modified dates shown: 21-Dec-2010 and 11-Jun-2010 |
| Pages | 19 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- 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 2B – Check the circuit response.
- Guided Step 3B – Check for an open circuit in the aftertreatment SCR catalyst temperature interface module.
- Guided Step 4B – Check the circuit response.
- Guided Step 4D – Check for a pin to pin short circuit in the engine harness or OEM harness.
- ECM Calibration
Applicable truck models
This file applies to Cummins CM2250 engine families named in the extract: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250. The covered fault is Fault Code 3142, SPN 4360 FMI 3, for the aftertreatment SCR inlet or intake temperature sensor circuit where high signal voltage is detected above 4.4-VDC for more than 2 seconds. For manufacturer information, visit Cummins official website.
Who needs this Cummins 3142 fault code manual
This manual is for diesel technicians, fleet maintenance shops, and workshop owners diagnosing an amber CHECK ENGINE lamp, MIL, disabled diesel exhaust fluid injection, torque reduction, or 8 km [5 mi] per hour inducement related to the SCR intake temperature sensor circuit.
The procedure directs the reader through inactive fault checking, sensor connector inspection, jumper-wire circuit response checks, interface module resistance checks, engine harness and OEM harness open-circuit tests, pin-to-pin short checks, ECM connector inspection, and ECM Calibration verification. It also points to Procedure 019-031 for Electronic Control Module (ECM), Procedure 019-032 for ECM Calibration, Procedure 019-043 for Engine Wiring Harness, Procedure 019-449 for Aftertreatment Gas Temperature Sensor, and Procedure 019-464 for Aftertreatment SCR Catalyst Temperature Sensor Interface Module. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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