This Cummins 1852 fault code document explains the water-in-fuel indicator fault and the troubleshooting steps for CM2250 engine applications. It covers circuit description, component location, diagnostic conditions, ECM lamp behavior, INSITE™ checks, calibration review, and clearing the code after repair.
Official Cummins 1852 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, with associated coverage listed for ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250, and other listed Cummins ECM platforms |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Water-in-Fuel Indicator Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletin numbers also listed in the procedure table |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 6 |
| 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 2A – Check if an ECM calibration update is available.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This PDF applies to Cummins electronic engine platforms listed in the fault-code procedure, including ISB6.7 CM2250 and other CM2250 engines such as ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The extracted procedure also lists ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150, ISL8.9 CM2150, ISM11 CM876, and ISZ13 CM2150 in the associated ECM calibration table. The water-in-fuel sensor is integrated into the bottom of the fuel filter, while the exact filter housing location varies by OEM. Official manufacturer information is available from Cummins.
Who needs this Cummins 1852 fault code manual
This manual is for mechanics, diesel technicians, and workshop owners diagnosing an amber CHECK ENGINE light or MIL related to SPN 97 FMI 16. It is useful when draining water from the fuel filter, confirming active or inactive counts with INSITE™, checking ECM calibration revision history, and validating that the code becomes inactive after the engine idles under the stated clearing conditions.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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