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SPN 628 FMI 2 – EEPROM Checksum Failure Fault Code (Symptoms, Causes & Fix)

The SPN 628 FMI 2 fault code indicates an EEPROM Checksum Failure within the Engine Control Module (ECM). This diesel engine fault code suggests that the ECM has detected a discrepancy in its stored data, which can affect engine performance and reliability. The diagnostic trouble code is crucial for identifying potential issues with the ECM's memory integrity.What SPN 628 FMI 2 MeansThe SPN 628 FM read more

SPN 609 FMI 16 – Internal temperature of CPC too high. Fault Code (Symptoms, Causes & Fix)

The SPN 609 FMI 16 fault code indicates that the internal temperature of the Common Powertrain Controller (CPC) is too high. This diesel engine fault code is triggered when the CPC detects a temperature that exceeds its operational limits, potentially affecting its performance and reliability. Understanding this diagnostic trouble code is crucial for maintaining the efficiency and longevity of the read more

SPN 609 FMI 13 – CPC Software Diagnostics Fault Code (Symptoms, Causes & Fix)

The SPN 609 FMI 13 fault code is a diagnostic trouble code indicating an issue with the Common Powertrain Controller (CPC) software diagnostics in a diesel engine. This fault code suggests that the ECM has detected a problem with the software integrity or communication within the CPC, which is crucial for managing the powertrain's electronic functions.What SPN 609 FMI 13 MeansThe SPN 609 FMI 13 fa read more

SPN 609 FMI 12 – CPC Hardware Failure Fault Code (Symptoms, Causes & Fix)

The SPN 609 FMI 12 fault code indicates a hardware failure within the Common Powertrain Controller (CPC) of a diesel engine. This diagnostic trouble code suggests that the ECM has detected an issue with the CPC's internal components, which could affect the truck's powertrain management. Understanding this fault is crucial for maintaining the vehicle's performance and reliability.What SPN 609 FMI 1 read more

SPN 608 FMI 14 – J1708 Data Link Failure Fault Code (Symptoms, Causes & Fix)

The SPN 608 FMI 14 fault code is a diesel engine diagnostic trouble code indicating a J1708 data link failure. This code suggests that the electronic control module (ECM) has detected a problem with the data communication network, specifically the J1708 data link, which is crucial for transmitting information between various control units in the truck. What SPN 608 FMI 14 Means When the SPN 608 FM read more

SPN 602 FMI 19 – J1939 Cruise Control Accelerate Switch Signal from Source #1, #2, or #3 is erratic Fault Code (Symptoms, Causes & Fix)

The SPN 602 FMI 19 fault code indicates an erratic signal from the J1939 cruise control accelerate switch, sourced from #1, #2, or #3. This diesel engine fault code suggests that the Electronic Control Module (ECM) is receiving inconsistent or unexpected signals from the cruise control system, potentially affecting its operation. What SPN 602 FMI 19 Means This fault code is triggered when the ECM read more

SPN 602 FMI 13 – J1939 Cruise Control Accelerate Switch Signal from Source #1, #2, or #3 is missing or not available Fault Code (Symptoms, Causes & Fix)

The SPN 602 FMI 13 fault code indicates a missing or unavailable signal from the J1939 Cruise Control Accelerate Switch, sourced from #1, #2, or #3. This diesel engine fault code suggests that the Engine Control Module (ECM) is not receiving the expected signal from the cruise control system, which can affect the vehicle's ability to maintain or adjust speed using cruise control. What SPN 602 FMI read more

SPN 600 FMI 19 – J1939 Cruise Control Coast Switch Signal from Source #1, #2, or #3 is erratic Fault Code (Symptoms, Causes & Fix)

The SPN 600 FMI 19 fault code indicates an erratic signal from the J1939 cruise control coast switch, sourced from either #1, #2, or #3. This diesel engine fault code suggests that the Engine Control Module (ECM) is detecting inconsistent signals from the cruise control system, which could affect its functionality. What SPN 600 FMI 19 Means The SPN 600 FMI 19 diagnostic trouble code is related to read more

SPN 600 FMI 13 – J1939 Cruise Control Coast Switch Signal from Source #1, #2, or #3 is missing or not available Fault Code (Symptoms, Causes & Fix)

The SPN 600 FMI 13 fault code indicates a missing or unavailable signal from the J1939 cruise control coast switch, sourced from #1, #2, or #3. This diesel engine fault code suggests that the ECM is not receiving the expected input from the cruise control system, which can affect vehicle operation.What SPN 600 FMI 13 MeansSPN 600 FMI 13 represents a communication issue within the cruise control sy read more

SPN 599 FMI 4 – Cruise Control SET and RESUME Circuits Failed Low Fault Code (Symptoms, Causes & Fix)

The SPN 599 FMI 4 fault code is a diesel engine diagnostic trouble code indicating that the cruise control SET and RESUME circuits have failed low. This fault code suggests an electrical issue within the cruise control system, where the Engine Control Module (ECM) detects a low voltage condition in the circuits responsible for setting and resuming cruise control.What SPN 599 FMI 4 MeansThe SPN 599 read more