Cummins fault code 1993 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags the Aftertreatment Diesel Particulate Filter Missing – Condition Exists condition (SPN 3064, FMI 11/31, Amber lamp). This 3-page PDF reproduces the manufacturer description, shop talk, component location and step-by-step troubleshooting so technicians can confirm and clear the code.
Cummins fault code 1993 overview
Cummins identifies this code as “Aftertreatment Diesel Particulate Filter Missing – Condition Exists” on the Aftertreatment Differential Pressure Sensor. The engine aftertreatment system monitors for the presence of the aftertreatment diesel particulate filter. This diagnostic check to make sure the aftertreatment diesel particulate filter is present and functioning correctly. The included troubleshooting tree guides technicians through key-on checks, wiring and connector inspection, and supply, return and signal circuit measurements taken at both the sensor and the ECM connector to isolate the failure.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Aftertreatment Differential Pressure Sensor — ISM CM871 fault codes |
| Fault code | 1993 (SPN 3064, FMI 11/31) |
| Warning lamp | Amber |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 3 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) equipped diesel engines that log Fault Code 1993. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before replacing parts. Full specifications are published on the Cummins official website.
Who needs this Cummins fault code 1993 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines use this sheet to verify the fault before parts are replaced.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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