How to test and repair your EVAP valve:

Post by **cn90** » 14 Dec 2012, 08:26

I want to add a tip.
If the repair does not work, go to ebay and enter: "Bosch 0280142300"
There are some vendors selling the Bosch EVAP Purge Valve for $44 (Volvo price is $70 for the same thing).

Post by **rmmagow** » 14 Dec 2012, 09:03

Reading this post makes me think my purge valve is bad. I do get a p0455 pretty much all the time along with a P0171, lean code. My thoughts are that the possible leak in the purge valve may contribute to the P0171 which indicates that adjusting fuel trim to compensate for a lean condition has gone out of spec. Does that make sense?
Anyway, I have a 98 V70 AWD, square charcoal canister under the battery tray. Where is my purge control valve? I suspect mine isn't round but can't find it. I have not been able to figure out how to remove my canister either. I have gotten it fully loose but it feels like there are hoses holding it in place and I am afraid I'll make matters worse by yanking on things. Can anyone point me to a diagram for the AWD V70 (not XC)? Gas cap is new and VOLVO.

Post by **cn90** » 14 Dec 2012, 09:32

See the post by "matthew1":
https://www.matthewsvolvosite.com/forums ... =1&t=24199

The purge valve is right behind the radiator, near the battery area.

Post by **cn90** » 14 Dec 2012, 09:47

I am just curious, has anyone cleaned this valve by submerging it in something like Carb Cleaner (Mineral Spirit etc.) over night instead of taking it apart?

Probably will accomplish the same job w/o usingt RTV sealant etc.

Post by **rmmagow** » 14 Dec 2012, 10:33

Thanks cn90,
I'll find that sucker tomorrow. Should it test poor, I'll do a carb cleaner thing and chime in afterwards. Be pretty sweet if that's my problem for the 455 and the 171, that will leave only a SAS pump error and a TCV problem that is probably old hoses.

Post by **cn90** » 14 Dec 2012, 11:31

For SAS pump.
Do the "SAS delete" using a diode.

Post by **cn90** » 15 Dec 2012, 11:39

Update,

Purge Valve Bosch 0280142300.
Took it out (it sits between the battery and the radiator).
- Two Torx screws later, it is out.
- Changed all hoses (old hose...dry rot)
- The old hoses bonded to the line, so used a utility knife and slice it gently along the hose to split it.

- Blow through valve (NOTE the arrow), it blows right through!
Should have been closed when out of the car.

- No need to disassemble the valve etc.
- Spray Carb Cleaner into both ports.
- Repeat this 10x until no more black gunk comes out
- Now blow through the port (again Note the arrow), it is shut.
So the Carb Cleaner trick did the job!!!

- Installed, all is good.

Anyway, just want to share this FREE fix with you guys!

JeffersV70 · Post by **JeffersV70** » 15 Dec 2012, 12:01

I'm going to have to try this, I've been running a p0455 code for 2 years now.

Post by **cn90** » 17 Dec 2012, 09:42

You will see that when you remove the Valve, it blows through. The closing mechanism has gunk build-up inside (see the photos at the beginning of this thread) that prevents it from closing. So it stays open all the time, thus the P0440 code.

Once you clean it with carb cleaner, you will see that the valve now closes properly.

It has been a few days, and the code P0440 is gone (usually this code comes up within 1-2 days).
So I am happy about this free fix.

Post by **cn90** » 23 Dec 2012, 08:20

Attached is the photo of the Purge Valve Bosch 0280142300 for those who want to take it out and clean it:

: VolvoEVAPValve.JPG (124.43 KiB) Viewed 7559 times

How to test and repair your EVAP valve:

Re: How to test and repair your EVAP valve: