I've been getting a P0442 periodically from my 97 850 wagon (base, no turbo). I've replaced the gas cap, the electrical part of the ignition switch, and all the deteriorated rubber vacuum-hose couplings I can find under the hood, but I'm still getting the code. I want to inspect the hose couplings at the evap canister, but there doesn't appear to be any way of getting to them other than removing the canister from under the car. Is there any other access to these?

Also, I've got VIDA running on my PC, and even though I've given it the VIN, it shows me the wrong evap canister in the parts diagrams. It shows the cylindrical canister, but my 850 has the rectangular canister. Does anybody know where I can view accurate diagrams showing the evap components in this car?

Bill is correct, check the vacuum hoses next to the fuel filter. There is also a line about 1/4" diameter of hard plastic that goes from the right rear to the right front, cuts across at the bottom of the radiator and makes it way to the charcoal canister.

Removing the rectangular canister is not a fun thing. The best you can do is just 'feel' the hoses on top and make sure they are not broken.
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My name is Klaus and I am a V♂lv♂holic

Klaus,

Honestly, I think I read one of your posts about this same problem, and that's how I solved it!

Thanks!

Bill

Two years ago at 143,000 miles on '98 S70, I had the same code. I replaced vacuum hoses under the hood, and checked the gas cap, and the code came back. I replaced two 3 inch sections of vacuum hoses back near the fuel filter, and that worked. I could tell the hoses were cracked from movement with the suspension.

Good luck.

Bill

Thanks Bill and Klaus. I checked the hoses at the rollover valve, and they are deteriorated. I ordered them today and should get them later in the week. I won't know for sure for about three weeks if that's the only leak in the system, as that's the approximate frequency that it throws the P0442 code.