Boost Pressure Solenoid

andyposter76 · Post by **andyposter76** » 13 May 2020, 10:55

Hello Everyone,
My 2001 v70xc is giving a code indicating a bad boost pressure solenoid. I cannot for the life of me find a resource to indicate where it is located on this specific model. Any information would be helpful. I’ve read the forums, and it seems that this item could be located in 5 different places depending upon your model.
Thank you

Post by **- Pete -** » 13 May 2020, 10:56

It’s clipped to the airbox, underneath the tube that runs from the airbox to the turbo. It has 3 vac lines going to it & an electrical connector with 2 wires.

: 0BEB28BB-B4E9-49DC-AE69-D533AA15A070.jpeg (99.44 KiB) Viewed 1254 times

andyposter76 · Post by **andyposter76** » 13 May 2020, 11:19

Thank you so much! That is incredibly helpful and much appreciated!

Post by **- Pete -** » 13 May 2020, 11:40

Double check fitment, but yours should be Pierburg 30670448.

Post by **SuperHerman** » 13 May 2020, 12:17

Check the three hoses and the electrical connection before ordering anything. It is very common for the hoses to disintegrate with age - focus on the line going to the turbo.

If you replace the unit or hoses - make sure to mark every hose carefully or change one at a time. It is ever so common to confuse them and reinstall the hoses incorrectly.

andyposter76 · Post by **andyposter76** » 13 May 2020, 16:16

Great advice! Thank you both. Hoses were good, and I found the part easily online for 1/4 the price I was quoted at a shop. I appreciate the help! Model specific information for this vehicle is not always the easiest thing to run down. So glad I found this forum!

Post by **ndphotonl** » 14 May 2020, 13:06

If someone wants to order the "HD" variant, its this Pierburg one. It's being used on Porsches etc

Pierburg TCV 7.22908.03.0

Volvo S80 2.4T Pierburg TCV 7.22908.03.0 by Andy Ramdin, on Flickr

Post by **- Pete -** » 16 May 2020, 01:24

With the HD TCV’s, I would caution people. The aftermarket non-pierburg HD TCV’s have many reports of failures at early ages. Especially when exposed to colder temps. Also reports of boost spikes etc which in some cases have been purported to be fatal (to the engine).

The general consensus amongst people not selling HD TCV’s is that it is best to stick with the stock Pierburg part number or Pierburg as a brand if going HD. Personally I don’t see the point in a HD TCV; for the average person just keeping their car healthy & running it is unnecessary. Even for a tuned car it’s splitting hairs, HD vs stock.

andyposter76 · Post by **andyposter76** » 16 May 2020, 07:56

Hey guys, I got the correctly matched part and did the change in about 4 minutes. Hoses weren’t compromised, clips didn’t break. Cost me $28 to do something my local shop quoted me a price of $225 on. Thank you all for your help!