When the measured value exceeds the nominal value + 0.2 bar
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 BMW 325i, 2005 BMW 325Ci, 2004 BMW 325i, 2004 BMW 325Ci, and 2003 BMW 325i. However, it is still accessible from the selected car via links, so may be relevant.
- Stop the engine and then monitor the measured value.
- When the measured value drops to the nominal value, the line cross-sections in the fuel return line are constricted or plugged.
- Check the fuel lines for kinks.
If no kinks are visible:
- Replace the return lines.
When the measured value remains too high, the pressure regulator is most likely faulty.