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P2 Can someone tell me what this part is? 31400692

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Wusonglin
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Year and Model: 2004 xc70
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Post by Wusonglin »

This part on my car looks broken. There was a spring in side and it fell out. I dont know what the replacement part is.
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br0dy519
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Post by br0dy519 »

Vacuum pump switch. Easily the most popular part identification request on MVS.
04s60 2.4
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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scot850
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Post by scot850 »

Here is a link to the part:

https://www.fcpeuro.com/products/volvo- ... o-31265825

Neil.
2006 V70 2.5T AWD Polestar tune
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2006 XC70 - Our son now has this and still parked in our garage
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abscate
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Post by abscate »

,,, and fix that, stat.

If the vacuum pump runs all the time it will burn up and it co$$t$$$
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BlackBart
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Post by BlackBart »

Can you tell us all which system this pump is in and it’s function? Could this be the quiet motor you hear sometimes after shutoff?
ex-1984 245T wagon
1994 850T5 wagon
2004 XC70 wagon BlackBetty
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br0dy519
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Post by br0dy519 »

The pump provides vacuum to the brake booster. It only runs to build vacuum when you turn the car on, and subsequently after that when you depress the brake pedal only if the switch hasn’t detected enough vacuum pressure. You can test the function of the pump by putting your key into position 2, disconnect the electrical connecter on the switch. Jump out the two terminals on the wire pigtail. The pump should engage.

Motor sound after shutdown could be blower motor, ECM/TCM cooling fan, or rad fan.
04s60 2.4
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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BlackBart
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Post by BlackBart »

Good explanation, thank you.
So the engine doesn’t produce enuf vacuum for the booster? Or is this a factor of a turbo engine and boost vs vacuum?
ex-1984 245T wagon
1994 850T5 wagon
2004 XC70 wagon BlackBetty
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abscate
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Post by abscate »

It is on both NA and turbo P2 cars And has more to do with CVVT. there are times when CVVT position destroys engine vacuum and the pump ensures that the brake booster has vacuum at all times

I thought it was Intake VVT that does this but I think jimmy corrected me on that
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br0dy519
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Post by br0dy519 »

My non-turbo 2.4 has a vacuum pump too.

Edit: I suppose thats redundant information, i always read “NA” as North America :mrgreen:
04s60 2.4
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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Wusonglin
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Joined: 05 Nov 2022, 07:21
Year and Model: 2004 xc70
Location: Albany NY

Post by Wusonglin »

Thanks
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