2006 XC 70, 115,000 miles. Ive only put about 2,000 miles on it. Check engine light = fuel pump problem. Replaced old pump with an aftermarket pump. It only worked for about 50 miles. Died 4 times on trip of 60 miles. Replaced after market pump with new pump ordered from Volvo. Traveled about 150 miles no problem. The today at the end of a 30 mile trip, it died about 2 miles from home. Each time it has died, I have been able to restart it. Saw one entry about possible crankshaft position sensor. Any other ideas?

 

To determine if it's a fuel pump/system problem - you need to know the fuel pump duty cycle - I forget the spec but I think it should be ~35-40%. More than that is a problem. Foreign materials in the gas tank has been known to cause multiple fuel pump failures and could be a possibility in your case.

BTW - In my part of the country I never saw a bad crank sensor on the aluminum block engines (from 1991-2018)

 

You were right. Fuel pressure was low due to a bad fuel sensor.