This fault code 195 DTCs document is a troubleshooting manual for the engine coolant level sensor circuit on CM2150 engines. It explains the fault path selection for 2-wire and 3-wire coolant level sensors, then gives guided diagnostic steps for active, inactive, and cleared faults. The PDF focuses on high signal voltage, open circuits, short circuits, connector inspection, sensor resistance, OEM harness checks, ECM connector checks, and INSITE™ fault-code handling.
Official fault code 195 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC and ISL with CM2150; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Engine Coolant Level Sensor 1 Circuit |
| Publication no. | FAULT CODE 08-fc195 |
| Year/Revision | Last Modified: 03-Jan-2008; later sections show 20-Jul-2010 and 08-Oct-2010 |
| Pages | 27 |
| File size | 0.6 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code Path Selection
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 195 – Two Wire Sensor
- FAULT CODE 195 – Three Wire Sensor
- 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 – Clear the fault code
Applicable truck models
This file applies to Cummins ISB, ISC and ISL engines with CM2150 control, with the library group identifying ISB6.7 CM2150 (2007-09). The extract does not name truck makes or chassis models, so application should be confirmed by engine family, ECM type, OEM wiring, and coolant level sensor configuration. The diagnostic covers sensors located in the radiator top tank or surge tank, with location details referred to the OEM troubleshooting and repair manual. For manufacturer information, visit the Cummins official website.
Who needs this fault code 195 DTCs manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this manual when an amber CHECK ENGINE light is linked to PID P111, SPN 111, FMI 3/3, and the coolant level sensor circuit voltage is above normal or shorted to a high source. It is useful before replacing a sensor, repairing the OEM Wiring Harness, checking connector pins, measuring resistance with a multimeter, verifying ECM calibration in QuickServe® Online, or using INSITE™ electronic service tool to clear inactive fault codes.
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