The fuel pressure regulator can leak and cause a hard start condition, without any faults recorded in the engine computer.
Car Problem Reports
Volvo V40 "Hard start" Due to Leaking Fuel Pressure Regulator
Volvo V40 Problem
Average Mileage: 82,666 mi (75,000 mi - 87,000 mi)
Visitor, 2001 Volvo V40, 75,000 mi
After the car sat for a while there would be a gas smell, much like a flooded carb. Then it would be hard to start. The Volvo tech was going to do a factory fix then checked the o-ring off the pressure regulator. It was pinched. He replaced the o-ring and I have not had this problem since. Car now has 113,000 mile on it.
Visitor, 2001 Volvo V40, 86,000 mi
I started to have a a small leak and I am trying to trace the source of the leak. (The leak appears to be form the front of the car) Also, I have had trouble starting the car lately. The weather temperature has become cold recently... I don't know it this contributes to the issue?
Visitor, 2003 Volvo V40
car hestkitates to start.
Visitor, 2002 Volvo V40, 87,000 mi