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P0325 After PCV Heater Hose Mod

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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charleskennedy23
Posts: 127
Joined: 11 November 2014
Year and Model: 1998 V70 T5
Location: Jacksonville, FL

P0325 After PCV Heater Hose Mod

Post by charleskennedy23 »

Hi Friends!

I drive a 98 V70 T5 and I recently did the PCV heater hose mod after breaking the PCV hard pipe. I got everything put back together and now I am getting the P0325 code for the knock sensor. I did remove the knock sensor while I was replacing the PCV hard pipe so I believe that I may have not re-installed the knock sensor at the right angle. So I have two questions:

1) how bad for the car will it be to drive around with the knock sensor not functioning properly? I typically run 93 octane fuel in the car.

2) Do I need to plan on replacing the knock sensor or is the issue really as simple as making sure the sensor is turned at about a 92-93 degree angle per Robery DIY's video on you tube (

thanks for the help!

ck
Charles Kennedy
"HAGRID": Black '98 Volvo V70 T5

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Post by abscate »

They take hardly any torque, so watch that wrench when reinstalling.

Alldata says 20Nm or just a wrist twist tight

That being said, this is one of those codes that almost always leads somewhere else.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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