What is CID 111:
CID 111 refers to an issue with the fuel pressure system, specifically the fuel pressure regulator. The ECM detects that the fuel pressure is either too high or too low, which can affect fuel delivery and lead to engine performance issues like poor acceleration, stalling, or fuel inefficiency.
Why This Happens:
- Faulty fuel pressure regulator.
- Shorted or damaged wiring in the regulator circuit.
- Loose or corroded sensor connectors.
- Low or inconsistent fuel pressure due to a malfunctioning fuel pump.
- ECM failure to interpret fuel pressure data correctly.
How to Fix It:
- Inspect the fuel pressure regulator for damage or malfunction.
- Test the regulator’s functionality to ensure it’s maintaining the correct pressure.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty fuel pressure regulator if necessary.
- Inspect the fuel pump to ensure it’s providing consistent pressure.
How to Avoid It Before It Happens:
- Regularly inspect the fuel pressure regulator and wiring.
- Perform routine fuel system maintenance.
- Keep connectors clean and free from corrosion.
- Perform diagnostic checks to monitor fuel pressure.
- Clue’s fuel management services track fuel pressure to detect issues before they affect engine performance.
