- Hyundai excavator spn 200 fmi 4 how to#
- Hyundai excavator spn 200 fmi 4 code#
Hyundai excavator spn 200 fmi 4 how to#
How to temporarily override this 5 MPH derate on a Cummins engine? Vehicle speed will be limited to 5 miles per hour or 8 km per hour. Critical SCR related fault codes have been active for an extended period of time and require immediate attention. Information – Aftertreatment SCR Operator Inducement – Data Valid But Above Normal Operating Range – Most Severe Level.Notification – Red Stop Engine Light On.
Hyundai excavator spn 200 fmi 4 code#
Cummins Fault Code – 3712 or SPN 5246 FMI 0. This fault is related to the “SCR Inducement” which is what regulates your truck to this derate. The dreaded fault code that causes the 5 MPH derate! So, the DEF module + ECM make up for controlling your entire operation. The DEF Module and Engine Control Module (ECM) are in direct communication to make sure the system is operational.ĮCM – The DPF system and the regeneration process is controlled by the ECM on a Cummins truck. NOx Sensors, both inlet and outlet sensors – When the sensor detects much NOx in the exhaust stream, it tells the SCR/DEF system to inject more urea, which uses ammonia to reduce emissions levels in your system.ĭEF Control Module – This module controls the operation of the emission system. If this fails, you will go into a derate immediately If you have bad DEF fluid, this can cause DEF quality issues and can put you into a derate.ĭEF Doser Valve – Regulates the injection of the DEF fluid into your SCR Catalyst.ĭEF Pump Assembly – This is the heart of your DEF system that pumps the DEF fluid throughout the DEF system. This has a level sensor and a quality sensor to make sure the concentrations are in allowable limits. What components make up the emission system that controls the 5 MPH derate?ĭEF Fluid – The tank with the blue cap holds DEF Fluid. However, when it’s a specific 5 MPH derate then you can be certain that the problem is related to the emissions, aka the aftertreatment system. A derate can be caused by various sensors or systems. A derate is designed to protect you from causing engine or DPF damage. 
What is a DEF derate or an aftertreatment derate?Ī derate means that the program inside the engine computer limits either the power or vehicle speed. It’s something we hear all the time because this is what happens when the truck detects a fluke in the system or from a malfunctioning component. Unfortunately, we hear this story on a daily basis from our customers. So, you crawl to the shoulder only to find that now you can’t even proceed driving. So, you hold the clutch down and put it into 2 nd gear to try to creep past that 5 MPH mark realizing after a few minutes that your truck will not budge. You pray that it’s not in the dreaded 5 MPH derate… The truck carrying your precious load is now in a critical state of emergency. When you start your truck back up you notice a red stop engine light and your DPF light is flashing. You just crossed the bridge into Canada and your 2013 Peterbilt 389 with a Cummins ISX CM2250 truck was turned off at the border checkpoint. You’ve heard the same story over and over, maybe even experienced it yourself.
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