What is CID 641:
CID 641 refers to a problem with the vehicle’s fuel system, particularly with the fuel injector control module (FICM). The ECM detects a malfunction or issue with the injector control circuit, which can result in poor engine performance or misfires.
Why This Happens:
- Faulty Fuel Injector Control Module (FICM).
- Shorted or damaged wiring in the injector control circuit.
- Loose or corroded connectors.
- Power supply issues affecting the FICM.
- ECM failure to properly process injector control data.
How to Fix It:
- Inspect the Fuel Injector Control Module (FICM) and wiring for damage.
- Test the FICM to ensure it is sending proper signals to the fuel injectors.
- Check connectors for cleanliness and tightness
- Replace the faulty FICM if necessary.
- Ensure stable power supply to the FICM and ECM communication.
How to Avoid It Before It Happens:
- Regularly inspect the FICM and wiring for damage.
- Keep connectors clean and free from corrosion.
- Perform routine diagnostic checks to monitor injector control performance.
- Ensure stable power supply to the FICM and ECM communication.
- Clue’s fuel management services track injector control systems and prevent issues before they affect engine operation.
