This fault code 196 DTCs document is a troubleshooting manual for the Coolant Level Sensor 1 circuit on CM2250 engines. It explains the low signal voltage fault, diagnostic conditions, sensor circuit checks, OEM harness tests, INSITE™ fault-code verification, ECM calibration review, and repair validation.
Official fault code 196 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Coolant Level Sensor 1 – 3 Wire Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletin numbers also include 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 30-Dec-2010; overview last modified 29-Jul-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 196 – Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source
- 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 engine coolant level sensor and circuit
- Guided Step 3 – Check the ECM and OEM harness
- Guided Step 4 – Check ECM calibration and clear fault codes
Applicable truck models
The procedure applies to Cummins CM2250 engine families listed in the associated procedures table, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The coolant level sensor is typically located in the radiator top tank or surge tank, with final component location referred to the OEM service manual. Official manufacturer information is available from Cummins.
Who needs this fault code 196 DTCs manual
This manual is for technicians diagnosing an amber CHECK ENGINE lamp, SPN 111 FMI 4, PID P2558, or low coolant level sensor signal voltage. It supports workshops using INSITE™ electronic service tool to test supply voltage, return circuit, signal circuit continuity, pin-to-pin shorts, pin-to-ground shorts, and ECM calibration status.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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