Cummins fault code 2733 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Aftertreatment Fuel Drain Valve Circuit condition (PID S338, SPN 4097, FMI 4/4, Amber lamp). This 6-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 2733 overview
Cummins defines this code as “AFTERTREATMENT FUEL DRAIN VALVE CIRCUIT – VOLTAGE BELOW NORMAL OR SHORTED TO LOW SOURCE” on the Aftertreatment Fuel Drain Valve Circuit. The aftertreatment fuel drain valve is used to disable the fuel supply to the aftertreatment system. Verify the electronic control module (ECM) calibration is correct. If necessary, calibrate the ECM. Possible causes of this fault code include: – Open return circuit in the engine harness, connectors, or shutoff valve – A shorted aftertreatment fuel drain valve.
According to the shop talk notes, possible causes include:
- include:
- Open return circuit in the engine harness, connectors, or shutoff valve
- A shorted aftertreatment fuel drain valve.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Aftertreatment Fuel Drain Valve Circuit — ISM CM871 fault codes |
| Fault code | 2733 (SPN 4097, FMI 4/4) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 6 |
| File size | 0.3 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 2733. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before starting repairs. Full specifications are published on the Cummins official website.
Who needs this Cummins fault code 2733 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines will 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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