Detroit DD15 GHG14 (2014-16) Fault Code: SPN 1328 FMI 31 (MCM) Idle Smoothness Control/Cylinder #6 Misfire At Idle - EcuForce Truck (2024)

FAQs

What is the code MCM 1328 FMI 31? ›

This Fault Code Sets when the Motor Control Module (MCM) Detects That Cylinder #6 Has Low rpm Speed with the Injector Commanded to Max Fueling. This is why you see smoke because a failed fuel injector. I would recommend you first check the injector and see if it has an issue and replace. Let me know if any questions.

SPN#1324, FMI#31 ― Engine Misfire Cylinder 2 -- Condition Exists -- Continued. 10) and run at idle. 6. Loud engine knock occurs.

SPN 1323/FMI 31

Description This Fault Code Sets when the Motor Control Module (MCM) Detects That Cylinder #1 Has Low rpm Speed with the Injector Commanded to Max Fueling for a count of two with all conditions met.

SPN#1325, FMI#31 ― Engine Misfire Cylinder 3 -- Condition Exists.

SPN#1326, FMI#31 ― Engine Misfire Cylinder 4 -- Condition Exists -- Continued.

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.

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”.

SPN (Single Pole & Neutral)

SPN#1322, FMI#31 ― Engine Misfire Multiple Cylinders -- Condition Exists -- Continued. MALFUNCTION. TEST OR INSPECTION. CORRECTIVE ACTION. 14.Check active engine faults.

What is a SPN isolator? ›

SPN isolator stands for single pole and neutral. In an SPN isolator, only one single pole allows current flow. Unlike SPN isolators, the TP&N isolator is much more commonly used. Therefore, if you are an electrician, you will find greater benefits with a TP&N isolator than with an SPN isolator.

FMI stands for failure mode identifier—this part of the fault code tells you what type of problem your truck has. For example, in the fault code SPN 3226 FMI 13, the SPN number 3226 tells you the problem is with the SCR outlet NOx sensor and FMI 13 tells you that the signal from the part is unavailable.

Diagnostic trouble code (DTC) P2285 stands for “Injector Control Pressure Sensor Circuit Low.” This code can be logged when the powertrain control module (PCM) detects voltage or resistance that is lower than the appropriate range within the injector control pressure (ICP) sensor circuit.

The OBD trouble code P0520 relates to the vehicle's engine oil pressure sensor or switch and its associated electrical circuit and its operation. It's a threshold issue with the oil pressure sensor, and the Powertrain Control Module (PCM) picks it up.

FMI stands for failure mode identifier—this part of the fault code tells you what type of problem your truck has. For example, in the fault code SPN 3226 FMI 13, the SPN number 3226 tells you the problem is with the SCR outlet NOx sensor and FMI 13 tells you that the signal from the part is unavailable.

SPN 3719/FMI 31 - Silent Code that Logs when the Diesel Particulate Filter Regeneration Lamp is Flashing in "Regen Zone 2." NOTE: This code is informational only and used by service to help understand which dash lights illuminated during normal service.

A common data failure is FMI 9 for an abnormal update rate or FMI 10 for an abnormal rate of change. An FMI 9 failure code is an issue with the CAN communication where data is not being sent and received in a timely way by the engine computer.