One problem related to accelerator pedal sensor has been reported for the 2001 Volvo S80. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Volvo S80 based on all problems reported for the 2001 S80.
I was driving on I-75 interstate and when I went to pass a vehicle in the left lane I felt a sudden loss of power in my engine. I then had to cut across 4 lanes of expressway traffic to get my car onto the shoulder. Then my car stalled out. Whenever I restarted it, it would stall back out again. The auto shop told me that I needed to replace my electronic throttle module, mass air flow sensor, and gas pedal sensor costing me well over $2000. (the old parts are at my house, I've kept them).