Secure gas cap to help prevent false EVAP codes on Volvo S70

Problem Description and Possible Solution
Evap Purge Valve/Canister Shut-Off Valve/Tank Pressure Sensor
*make sure to always properly secure the fuel filler cap after fill-up!
Problem Data
RepairPal Verified
Average mileage: 124,000 (72,000–176,000)
3 model years affected: 1998, 1999, 2000
4 people reported this problem
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Bad gas cap was replaced and the error code cleared