Check the High-Pressure Hose
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Check the high-pressure hose for blockage and leakage. Clean and replace the high-pressure hose if necessary.
Repeat the check from Start the Engine .