Cummins ISB4.5 CM2150 Fault Code: 3563 PID: SPN: 5491 FMI: 4 Aftertreatment Diesel Exhaust Fluid Line Heater Relay  - Voltage Below Normal Or Shorted To Low Source. - EcuForce Truck (2024)

FAQs

What is the code 5491? ›

Code 5491 applies to employers engaged exclusively in wallpaper hanging operations. Lightweight or heavyweight, patterned or solid color wallpaper, some with adhesive backings, some with vinyl coating, grass cloth etc., are used to cover interior walls of rooms in both residential and commercial buildings.

The root cause of the 3596 codes is a cracked suction tube in the DEF tank head assembly suction tubes.

Fault Code: 5391

Possible reduced engine performance. Incorrect battery voltage setting in the recommended Cummins® electronic service tool or equivalent.

SPN 4 FMI 4 is a code used to diagnose a problem with the fuel injectors on a diesel engine. This code is often associated with a loss of power, and the engine may run rough or stall. If you are experiencing these symptoms, it is important to have your vehicle checked by a qualified mechanic as soon as possible.

Master codes are comparable to cheat codes: they give access to powerful features. For instance, look up the Konami code: it is a famous cheat code for video games. Many an application and peripheral devices like printers and routers have a master code to allow access for configuration.

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.

It's known as the 53 block problem, because these engine blocks have the number 53 cast into the side of the crankcase. After years of use, the 53 blocks tend to crack until coolant starts to pour out the side of the block.

3361 is for either the DEF doser or the intake manifold pressure abnormal. If it is a SPN fault, check the DEF fluid to make sure it isn't contaminated. If it is a Cummins fault 3361, then do a ECM calibration update if there are not intake leaks at all on the truck. Make sure the turbo isn't passing oil.

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.

The FMI 5 in this example tells us that there is low current (amps) or an open in the circuit. Generally, this type of fault tells us that there is a wire that is broken or disconnected.

What is the FMI failure mode indicator? ›

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”.

The BMP throttle valve provides a straight through connection to the intake manifold eliminating the "butter fly valve" which will reduce turbulence, help lower egt's and increase air flow.

A VP44 electronic rotary distribution pump that distributes and meters high pressure fuel required for injection.

Fault Code 141 indicates an issue with the oil pressure sensor circuit. The oil pressure sensor monitors engine oil pressure and reports readings to the ECM.

Summary. The P0720 code indicates a problem with the output speed sensor, which doesn't function properly for a few reasons. These reasons may include the sensor itself and things like old transmission fluid, bad electrical wiring, or a PCM malfunction.