Volvo Repair: evap.control-small leak, charcoal canister, inner fender

Question
hello,i am having a problem diagnosing a 1996 850 n/a with a code po442a. any help would be great

Answer
it could be many things.you would need to use a pressure regulator and air to pressurize the fuel system vent side.then look for a leak.check the hoses at the charcoal canister which is under the drivers front fender area.check the big hose from this to the shut off valve which is located in the drivers inner fender.