What is SPN 4374:
SPN 4374 refers to a problem with the Fuel Injector Control Module (FICM), which is responsible for regulating fuel injector performance. This fault code usually indicates an issue in the communication circuit, which could cause fuel injectors to function improperly, affecting engine performance and fuel delivery.
Why This Happens:
- Faulty Fuel Injector Control Module (FICM).
- Damaged or shorted wiring in the FICM circuit.
- Loose or corroded connectors in the FICM communication circuit.
- Power supply issues affecting the FICM.
- ECM failure to interpret the data from the FICM correctly.
How to Fix It:
- Inspect the Fuel Injector Control Module (FICM) and wiring for visible damage.
- Test the FICM’s voltage and functionality to ensure it’s operating correctly.
- Check the wiring and connectors for visible damage or corrosion.
- Replace the faulty FICM if it is malfunctioning.
- Verify that the ECM is receiving and interpreting data from the FICM properly.
How to Avoid It Before It Happens:
- Regularly inspect the FICM and wiring for damage or wear.
- Keep connectors clean and ensure they are free from corrosion.
- Perform routine diagnostic checks on the fuel injector control system.
- Ensure a stable power supply to the FICM.
- Clue’s Fuel Management services provide real-time monitoring of fuel injector control systems to prevent performance issues.
