Cummins ISX12 CM2250 (2010-12) Fault Code: 3151 (MR) 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.

This fault code can be caused by a failed or damaged injector causing continuous injection. If an injector nozzle is fractured or stuck open, continuous fueling will occur in that cylinder.

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.

6.7L Cummins, 2018 KW, Code 3134. "DPF outlet pressure sensor circuit voltage below normal or shorted to low.

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.

Fault Code: 3714: Engine Protection Torque Derate – Condition Exists. Cummins Fault codes 3712 and 3714. If these fault codes are active, this means the engine performance is already reduced (power derate) and possibly the vehicle speed is also limited.

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.

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

Here's a quick summary on the Cummins fault codes: 3497 and 3498: These fault codes indicate that the DEF tank level was low. 3488: This fault code indicates a communication issue between the ABS controller and the ECM.

SPN stands for Suspected Parameter Number which tells you the circuit where the fault occurred. For example, if you had a SPN 1791 code, it would point to a fault detected in the EGR Valve Control Circuit. FMI stands for Failure Mode Indicator which tells you the reason the fault code was set.

What is the code 3543 on a Cummins engine? ›

Fault Code 3543-The diesel exhaust fluid quality is not sufficient enough to provide adequate NOx reduction.

Fault Code 4713 is a fueling error diagnostic for equally malfunctioning injectors. The diagnostic has recognized the collective fueling between injectors has drifted beyond a known threshold.

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.

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

SPN 51/FMI 2 - ALL YEARS

This diagnostic is typically Intake Throttle Position Deviation Error. This code sets when the intake throttle valve position has a 30% deviation from the position commanded by the Motor Control Module (MCM) when the engine coolant temperature is above 60°C (140°F).

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.