The Cummins fault code 3167 troubleshooting guide is the official Cummins diagnostic procedure for Aftertreatment Doser – Data Valid But Below Normal Operating Range – Moderately Severe Level on the ISX11.9 CM2250 engine platform. This 7-page PDF documents the circuit description, the conditions that set and clear the fault, and the guided steps a technician follows to isolate and repair it.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250/ISX15 CM2250 |
| System / Group | Aftertreatment Doser Circuit |
| Fault code | 3167 (SPN 3556, FMI 18) |
| Warning lamp | Amber |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
| Last revised | 11-Jun-2010 |
Cummins fault code 3167 contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and guided troubleshooting steps
Fault meaning and symptoms
The document defines fault code 3167 as Aftertreatment Doser – Data Valid But Below Normal Operating Range – Moderately Severe Level. The aftertreatment fuel injector is electronically controlled by the engine electronic control module (ECM) through a pulse width modulated (PWM) signal. The amount of fuel injected is determined by how long the PWM signal to the injector is on. The condition is monitored on SPN 3556, FMI 18, and is annunciated with an amber CHECK ENGINE / malfunction indicator lamp. Each fault is worked with the INSITE electronic service tool, cross-referencing associated procedures 011-054, 011-042, 019-032.
Applicable truck models
This procedure covers Cummins ISX11.9 CM2250/ISX15 CM2250 engines built for the 2010-12 on-highway emissions platform, so it suits Class 8 trucks and vocational chassis running these engines. Confirm the exact application and current calibration against the official Cummins website before ordering parts.
Who needs this Cummins fault code 3167 manual
Diesel technicians and workshop owners who read 3167 on the INSITE service tool use this manual to follow the factory-approved diagnostic tree instead of replacing parts by guesswork. It is equally useful for fleet maintenance staff verifying a repair before returning a truck to service.
The full PDF is available in the DiagTechPro manuals library, a free account is required to download.
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