What is CID 626:
CID 626 refers to a problem with the vehicle's fuel system, specifically with the fuel pressure regulator. The ECM detects an abnormal signal from the regulator, which could cause incorrect fuel pressure and lead to engine performance issues like poor acceleration, stalling, or reduced fuel efficiency.
Why This Happens:
- Faulty fuel pressure regulator.
- Shorted or damaged wiring in the regulator circuit.
- Loose or corroded connectors.
- Low fuel pressure due to malfunctioning fuel pump.
- ECM failure to properly process fuel pressure data.
How to Fix It:
- Inspect the fuel pressure regulator and wiring for visible damage.
- Test the regulator’s performance to verify it maintains proper pressure.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty fuel pressure regulator if necessary.
- Inspect the fuel system for low pressure or malfunctioning fuel pumps.
How to Avoid It Before It Happens:
- Regularly inspect the fuel pressure regulator and wiring.
- Perform routine fuel system maintenance.
- Keep connectors clean and corrosion-free.
- Perform diagnostic checks to monitor fuel pressure.
- Clue’s fuel management services track fuel pressure systems to detect issues before they affect engine operation.
