Cummins ISB4.5 CM2150 Fault Code: 3151 PID: SPN: 4794 FMI: 31 Aftertreatment SCR Catalyst System Missing - Condition Exists. - EcuForce Truck (2024)

FAQs

What is fault code 3151 Cummins? ›

5655 is a derate fault and 3151is a fault that states that the SCR is missing. This is usually caused by a faulty outlet nox sensor in my experience.

SPN 521049/FMI 31

Description This Code Sets When There is a Code Present for the Diesel Exhaust Fluid (DEF) Tank Level, DEF Dosing Unit, DEF Pump, NOx Sensors, Blocked DEF Line, DEF Quality, NOx Efficiency, Selective Catalyst Reduction (SCR) Harness and/or SCR Sensor. Monitored Parameter.

A derate means that the program inside the engine computer limits either the power or vehicle speed. A derate is designed to protect you from causing engine or DPF damage. A derate can be caused by various sensors or systems.

This fault code becomes active when the aftertreatment diesel oxidation catalyst intake and aftertreatment diesel particulate filter intake temperature sensors do not detect the presence of a catalyst in the aftertreatment system. A damaged catalyst.

Using a code reader tool, connect to the ECM and find the “fault codes” tab. The displayed codes can generally be clicked on one by one. Another option is to select “erase all faults” and then follow the onscreen instructions. At the end of the procedure, the ignition key should be turned off.

In summary, SPN 4364 FMI 18 is an engine error code related to the aftertreatment system of a diesel engine. It can indicate a variety of issues, ranging from a faulty NOx sensor to a malfunctioning DEF system. Symptoms include the illumination of the check engine light and potential engine derate mode.

A Suspect Parameter Number (SPN) is a specific code used in the automotive industry to identify and diagnose faults codes in electronic control units (ECUs) within vehicles.

The FMI may indicate that a problem with an electronic circuit or an electronic component has been detected. The FMI may also indicate that an abnormal operating condition has been detected. The codes are displayed in the form “SPN – FMI”.

FAILURE MODE IDENTIFIERS (FMI) Now that we have defined MID (The component) and PID (types of data), we can talk about Failure Mode Identifiers (FMI). Every diagnostic trouble code (DTC) that you find will have an FMI.

You won't damage anything if you continue to operate the engine, but within a couple of hours you'll probably be derated to 5 mph. I would recommend that you get to a shop that can I pull the fault codes and make the repairs for you. If you have any follow-up questions or need any further assistance just let me know.

What does it mean when the DPF is full engine derated? ›

A DPF Filter that is too full or not properly functioning threatens both the environment and the truck. The engine can derate when a needed regen does not occur, potentially causing downtime by leaving the vehicle in a state that is either undriveable or in “limp mode” where it can only operate at slow speeds.

3714-This fault code is for information only, and indicates that an engine power derate has been implemented in order to make sure that the critical fault codes that are presently active in the ECM are addressed as quickly as possible.

The most probable cause of this fault code is a faulty particulate matter sensor.

Fault Code 74 sets due to the engine failing to respond to torque or speed requests sent by the TECU. Possible causes for this fault are due to OEM issues and cannot be caused by the transmission wiring or TECU.

CUMMINS FAULT CODE 559 – Injector Metering Rail 1 Pressure – Data Valid But Below Normal Operating Range – M. Seized ceramic plunger compared to how it should look normally.

A diesel particulate filter (DPF) differential pressure sensor measures exhaust backpressure and signals when the power-train control module (PCM) should begin a regeneration process to clear the filter of diesel particulate matter (DPM), or soot.

The oil pressure sensor circuit fault code 135 indicates a problem with the oil pressure sensor or related wiring. The oil pressure sensor monitors engine oil pressure and sends a voltage signal to the ECM.

A failure to maintain the correct fuel tank pressure results in trouble code P0456.

Malfunction Indicator Lamp (MIL) Lights up to warn the driver to schedule service soon. May light up in addition to other lamps. Red Stop Engine Lamp Indicates that engine must be stopped as soon as it is safe to do so.