Emissions test... P0442 p0445

fs · Post by fs » 12 Oct 2009, 19:26

READ ALL TO UNDERSTAND

So this post is a FYI for smog/emission purposes...hope it helps someone.

Over the past year I have gotten the annoying "fuel filler cap-open loose" and dtc P0445(large Evap Leak) code. Smog time came so I changed fuel cap because thats what I thought it was....CEL still came on.....after reading about the code I checked the purge valve on the radiator(It didn't click when power was applied)replaced it, cleared code and drove awhile....CEL came back on after a day or so..new code was P0442(Small evap leak).........looked for cracked lines and found nothing.

I was so worried it wouldn't pass the emissions test....I read and read online..For those of you that have code readers, check out your reader.......if it has the function that tells you about the "System monitors" check those out.......here comes the good part.....here in California(Strict emissions)your vehicle only has to have 5 of these monitors as ready....what does that mean? Well, it means that you can clear your P0442 code and still pass the test........I cleared my code, drove until I had 5 of the monitors ready, then went and got my smog test......PASSED WITH FLYING COLORS.

Bad part is I still have to figure out why its coming on, but hey, at least i have my sticker to drive still. My suggestion for anyone is to call a Local smog station and ask how many monitors have to be ready...thats what I did.

eM3RgE · Post by **eM3RgE** » 26 Oct 2009, 11:17

Good to know! I have the same code (P0445) on my S80 T9 1999, checked the gas cap & fuel hose inlet. I was wondering if there is anything else that needs to be looked at for this kind of a code. Thanks

mdvolvo · Post by **mdvolvo** » 26 Nov 2009, 06:47

I worked on volvo for over 25 years but now do it as a hobby.
Here is the fix.
There is a hose that is attached to the evap canister and valve that is cracked. They all do. It is about 9 inches long with a hooked end.
The canister is located above the rear sub frame of the car directly in the middle.
Remove the right rear wheel and look straight through the gap and the one end of the hose can be seen attached to the canister.
Replace the hose and that will solve that evap leak problem
Not too much of a difficult job

Post by **dcarlson12** » 26 Nov 2009, 10:56

To mdvolvo:
I guess one has to buy the hose from Volvo dealership i.e. one can't just make a hose?
Thks.
Sounds like this might solve the problem I am having (see my post: 1999 S80 T6 Emission code D what does shut off valve do?)
Could this also cause the intermittent smell of gas?

mdvolvo · Post by **mdvolvo** » 26 Nov 2009, 11:53

The hose can be made up.
The original does not cost much at volvo dealer,
Looks like a piece of half inch hose with clamps would work also but it must not be kinked when connected
Will post pics of the original tomorrow.

Post by **dcarlson12** » 27 Nov 2009, 12:23

To mdvolvo:
Is the hose to which you refer shown on the attached parts diagram? If so, which one is it? The hoses shown in the drawing don't seem to include any hoses which might be coming from the gas tank...
Thks,
Dwight

mdvolvo · Post by **mdvolvo** » 27 Nov 2009, 17:30

The hose that creates the problem is number 6 which connects to the valve to number19 that is a part of the filler neck of the gas tank
I replaced the one on my car because it was porous and bleeding off the tank pressure
No 442 0r 445 codes since replacement
My car has 206089 miles

Post by **jbo6924** » 16 Sep 2010, 08:37

Any chance that the part # for the evap hose for a 1998 v70 t5 is available? I've checked out IPD and the site list 2 Part #'s-9443308 and 9443309. Both have similar shape but are obviously different, just want to order the right part.
Thanks

Post by **Auburn T5** » 10 Sep 2012, 21:06

Going to bump this old thread. My 99T5 is throwing P0445 and 448 codes at me. Both apparently evap system leak codes.

I checked under the car and found this.

Replaced the line with a small piece of silicone hose.

Cleared the codes, drove around and the same 2 codes are back for whatever reason.

I didnt' inspect the rest of the area for leaks so I'm assuming that there is another leak somewhere?? Or could there be something else causing the problem?

Worth noting is that the car is also throwing numerous o2 sensor codes (P0031, 0136, 0135 and an unrelated - i think - P0245 which I believe is telling me that the GM boost control solenoid I replaced the stock unit with has failed) So I don't know if those other codes are somehow messing with the ECU and it thinks that the evap system is still messed up?

**EDIT**

Fuse 5 in the main fuse box was bad. The 20 amp fuse that was blown according to the owners manual is emissions related. The evap system codes seem to be gone now.

ThommyKent · Post by **ThommyKent** » 21 Jun 2016, 19:21

mdvolvo wrote:I worked on volvo for over 25 years but now do it as a hobby.
Here is the fix.
There is a hose that is attached to the evap canister and valve that is cracked. They all do. It is about 9 inches long with a hooked end.
The canister is located above the rear sub frame of the car directly in the middle.
Remove the right rear wheel and look straight through the gap and the one end of the hose can be seen attached to the canister.
Replace the hose and that will solve that evap leak problem
Not too much of a difficult job

I just repaired this hose as it had a very small crack at the hooked end. It fixed the p0455 code that kept returning. Maybe on a lift it`s not to bad a job, but`s not a lot of fun on the floor.