Volvo Check Engine light problem. Should I keep the car?

I have volvo xc70 with 43k miles. Two weeks ago the check engine light came on. I took to the dealer. They upgraded the software and did tank test and said it was no leak and cleared the code. One later after 200 miles the light came back on. I took it back again. The code reads fule leakage. They did the test again and no leak. They had no idea and called the Volvo corporation for advise. They changed the leak detection pump and said since there was no leak it must be the faulty leak detection pump.

I just got it back yesterday. Hope it was fixed. My worry is the car will be out warranty in few months. Should I sell or keep it? I like this car but am worrried about the reliability. I bought is used 1.5 years ago and already replaced the radiator last year and had few electrical problems. Thanks for your comments!