P0442 trouble code

**dreware** · 08-31-2009, 06:04 AM

I have this trouble code and I searched for it and it just says small evap leak. How does one know if there is a crack in one of the tubes that runs all the way back to the gas tank? Do you have to do the smoke test from the dealer? I have noticed that when I get gas, there is no pressure when I take the cap off. I was thinking there was a crack in the filler hose, but maybe it's one of the recirculating lines that ties in with the charcoal/evap canister? Thanks for any help!

**ChicagoXC** · 04-16-2010, 05:13 PM

While we're asking...

I have the same trouble with the code. The dealer narrowed it down to the J-hose at the charcoal canister. I finally

found the canister above the rear differential, but I can't figure out how I might swap the J-hose which attaches to it?

Anybody changed one?

Is there access from inside the car (like for a fuel pump)... or do I have to drop the tank?

Thanks...

**RockitShip** · 04-16-2010, 11:25 PM

You have to drop the tank to get to the J hose.

I had a similar situation but it turned out to be my MAFS, not saying you're situation is the same as mine.

However, I strongly suggest you replace all of your vacuum lines ( I personally like the silicone hoses), along with the gas cap and then clear code to see if it comes back.

**ChicagoXC** · 04-17-2010, 01:26 AM

Thanks..

I thought so.

I already replaced the MAF sensor when it threw a different code. And, I have a new gas cap with a good o-ring. I've also cleared this code a couple of times... it just comes right back in a day or so..

My wife took the car in for service some time ago and the dealer said the hose was bad. I don't know what test (smoke? pressure?) they did to confirm it was that particular hose, but what little bit of the hose I 'can' see from under the car (flashlight, yes... lift, no), it looks pretty bad.

How hard is it to drop the tank?

(Note: I'm not above cutting a hole in the floor of the back deck to get at the canister! I've already done much worse things to this poor car. And, I'm not a quitter - haha.

)

Thanks.

**Charlys15** · 08-19-2017, 09:20 AM

Hello,Im new here i want to know where the evap canister fit in my xc70 wagon year 05 ?
Please can some one tell me !!
Thanks for now

**Xfingers** · 08-20-2017, 05:11 AM

You can get a lot of good info quick if you use the Search box in upper-right-hand corner of your screen. Here's results for: evap canister

http://www.volvoxc.com/forums/search...archid=2480913

**pbierre** · 08-20-2017, 02:48 PM

You need a very quiet environment (nighttime), but the easiest way to find any vacuum leak is to run the engine a very short time (10 secs) to build up vacuum, then turn everything off. Then, just use your ears....listen for a hiss. For finding engine vacuum leaks, the old airplane (pre-electronic) earphones make a great stethoscope probe. You can buy a mechanic's stethoscope cheap.