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SPN 2630 FMI 4 – Charge Air Cooler Outlet Temperature Circuit Failed Low Fault Code (Symptoms, Causes & Fix)

The SPN 2630 FMI 4 fault code is a diagnostic trouble code indicating that the Charge Air Cooler (CAC) Outlet Temperature Circuit has failed low. This diesel engine fault code suggests that the Engine Control Module (ECM) is receiving a signal from the CAC outlet temperature sensor that is below the expected range, potentially affecting engine performance. What SPN 2630 FMI 4 Means SPN 2630 FMI 4 read more

SPN 2630 FMI 3 – Charge Air Cooler Outlet Temperature Circuit Failed High Fault Code (Symptoms, Causes & Fix)

The SPN 2630 FMI 3 fault code is a diagnostic trouble code that indicates a high failure in the Charge Air Cooler (CAC) Outlet Temperature Circuit. This diesel engine fault code suggests that the Engine Control Module (ECM) is receiving a signal from the CAC outlet temperature sensor that is higher than expected, potentially affecting engine performance. What SPN 2630 FMI 3 Means When the SPN 263 read more

SPN 2623 FMI 14 – 2-Channel Accelerator Pedal GAS1 and GAS2 Signal Missing Fault Code (Symptoms, Causes & Fix)

The SPN 2623 FMI 14 fault code indicates a missing signal from both channels of the accelerator pedal position sensor, specifically GAS1 and GAS2. This diesel engine fault code is triggered when the Engine Control Module (ECM) detects that the expected signals from the accelerator pedal are absent, suggesting a potential issue with the sensor or its associated circuitry. What SPN 2623 FMI 14 Mean read more

SPN 2623 FMI 8 – 2-Channel Accelerator Pedal Signal 2 Missing Fault Code (Symptoms, Causes & Fix)

The SPN 2623 FMI 8 fault code is a diagnostic trouble code indicating a missing signal from the second channel of the accelerator pedal position sensor in a diesel engine. This diesel engine fault code suggests that the Engine Control Module (ECM) is not receiving the expected signal from the accelerator pedal, which can affect throttle control and engine performance.What SPN 2623 FMI 8 MeansThe S read more

SPN 2623 FMI 2 – Accelerator pedal "in-range" fault. Fault Code (Symptoms, Causes & Fix)

The SPN 2623 FMI 2 fault code is a diesel engine diagnostic trouble code that indicates an "in-range" fault with the accelerator pedal position sensor. This code suggests that the Engine Control Module (ECM) is receiving a signal from the accelerator pedal that is within the expected range but is still considered faulty, potentially due to inconsistencies or unexpected behavior in the signal. Wha read more

SPN 2596 FMI 9 – J1939 CM1 Message (Maximum Vehicle Speed Limit) is Missing or Not Available Fault Code (Symptoms, Causes & Fix)

The SPN 2596 FMI 9 fault code indicates that the J1939 CM1 message, which communicates the maximum vehicle speed limit, is missing or not available. This diesel engine fault code suggests a communication issue within the vehicle's speed control system, potentially affecting the engine's ability to regulate speed effectively. What SPN 2596 FMI 9 Means The SPN 2596 FMI 9 fault code represents a mis read more

SPN 2049 FMI 9 – J1939 Message is missing from source address 49 (dec) Fault Code (Symptoms, Causes & Fix)

The SPN 2049 FMI 9 fault code indicates a communication issue within the diesel engine's electronic control system. Specifically, it means that the J1939 message from source address 49, typically the Aftertreatment Control Module (ACM), is missing. This diagnostic trouble code suggests a loss of communication between the Engine Control Module (ECM) and the ACM, which can affect the aftertreatment read more

SPN 2042 FMI 9 – J1939 Message is missing from source address 42 (dec) Fault Code (Symptoms, Causes & Fix)

The SPN 2042 FMI 9 fault code indicates a communication error within the diesel engine's aftertreatment system. Specifically, it means that the J1939 message from source address 42 (decimal) is missing, which typically involves the Aftertreatment Control Module (ACM). This diagnostic trouble code suggests that the Engine Control Module (ECM) is not receiving expected data from the ACM, potentially read more

SPN 2033 FMI 9 – J1939 Message is missing from source address 33 (dec) Fault Code (Symptoms, Causes & Fix)

The SPN 2033 FMI 9 fault code indicates a communication issue within the diesel engine's electronic control system. Specifically, it means that the J1939 message is missing from source address 33, which is typically associated with the Aftertreatment Control Module (ACM). This diagnostic trouble code suggests that the Engine Control Module (ECM) is not receiving the expected data from the ACM, whi read more

SPN 2025 FMI 9 – J1939 Message is missing from source address 25 (dec) Fault Code (Symptoms, Causes & Fix)

The SPN 2025 FMI 9 fault code indicates a communication error on the J1939 data link, specifically that a message is missing from source address 25 (decimal). This diesel engine fault code suggests that the Aftertreatment Control Module (ACM) is not sending or receiving the expected data, which can affect the performance of the aftertreatment system.What SPN 2025 FMI 9 MeansSPN 2025 FMI 9 is a dia read more