Spn 3251 fmi 21, Standard Repair Times: Due to the number of engine/vehicle combinations and possibilities for repairs, see appropriate SRT manual section, linked below. This document provides steps to diagnose an active SPN 3251 FMI 21 fault code, which indicates that the DPF differential pressure sensor is excessively low. MC-10117213-9999 - Free download as PDF File (. txt) or read online for free. . Begin by inspecting the EGR temperature sensor wiring and connectors for damage or corrosion. Technician: Joey Hi! Welcome to JustAnswer. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. If you don't take the time to look into Spn 3251 Fmi 21 engine problem when it arises, it can add up quickly. The diagnostic steps include verifying calibration levels, performing visual inspections and a snap throttle test, inspecting the DPFDP sensor SPN FMI Code List This spn fmi codes help explain the underlying meaning of the numerical components which build an engine fault code. 3 SPN 3251/FMI 21 - GHG17 Diesel Oxidation Catalyst Inlet / Outlet Pressure - Not Plausible Table 2. SPN 3251 FMI 21 indicates a fault in the Exhaust Gas Recirculation (EGR) system sensor or circuit. WARNING: PERSONAL INJURY Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. It seems you're experiencing an inactive code SPN 3251 FMI 21 on your 2015 International, and the yellow engine light is illuminated, right? Got an international with maxxforce 7 in it with the following codes: spn 100 fmi 1, spn 1378 fmi 31, spn 3251 fmi 21. The FMI, or Failure Mode Identifier, provides additional context on the fault. Learn what SPN 3251 FMI 21 means, its causes, and how to fix it. Jul 15, 2025 · MaxxForce DT 2010–2019 fault code list with specs and quick reference to help diagnose and repair medium-duty International trucks. - This is not a comprehensive list, or an alternative to the standard fault diagnostic process and only serves as a supplemental reference. This article provides an in-depth analysis of the fault code, its implications, and how to address it effectively. Spn 3251 Fmi 21 problem code is about Doc Inlet / Outlet Pressure Not Plausible: Aftertreatment 1 Diesel Particulate Filter Differential Pressure Data Drifted Low; Low Delta Pressure Caused By Dpf Pressure Sensor Drift. Oct 30, 2024 · Receiving the SPN 3251 code along with FMI 16 indicates a specific issue related to your Diesel Particulate Filter (DPF) system. Follow our simple guide to resolve the issue and get your equipment running smoothly. pdf), Text File (. Detroit DD16 GHG14 (2014-16) Fault Code: SPN 3251 FMI 21 (ACM) Diesel Oxidation Catalyst Inlet/Outlet Pressure – Not Plausible Aug 20, 2024 · Understanding Fault Code SPN 3251: A Comprehensive Guide for Engineers and Mechanics SPN 3251 is a critical fault code related to the After treatment Diesel Particulate Filter (DPF) Differential Pressure in heavy-duty diesel engines.


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