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by januwan
07 Sep 2026, 14:02
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: hissing sound 97 850 NA
Replies: 5
Views: 169

Re: hissing sound 97 850 NA

Resolved. One thick hose wasn't connected. Everything works fine now. Sorry for wasting the server space.
by januwan
07 Sep 2026, 13:32
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: hissing sound 97 850 NA
Replies: 5
Views: 169

hissing sound 97 850 NA

I replaced the PCV system, and when I started the engine, I could hear a hissing sound from the manifold area. The other symptoms are a rough idle and very hard braking. It would suggest an intake manifold gasket leak, but why the hard braking? What did I mess up this time?
by januwan
23 Aug 2026, 19:11
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Broken connector 97 850 NA
Replies: 6
Views: 992

Re: Broken connector 97 850 NA

I found this one https://www.partsgeek.com/z9mv19n-volvo-850-camshaft-position-sensor.html?utm_source=google&utm_medium=ff&utm_content=UK&utm_campaign=PartsGeek+Google+Base&utm_term=1993-1997+Volvo+850+Camshaft+Position+Sensor+Walker+235-91606+93-97+Volvo+Camshaft+Position+Sensor+1994&fp=pp&gbm=a ...
by januwan
23 Aug 2026, 17:55
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Broken connector 97 850 NA
Replies: 6
Views: 992

Re: Broken connector 97 850 NA

It's the camshaft position sensor, but where can I get a male and female connector? Does anybody know the PN for both?
by januwan
23 Aug 2026, 16:06
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Broken connector 97 850 NA
Replies: 6
Views: 992

Broken connector 97 850 NA

While fixing my PCV problem, I messed up this connector. What is the proper name for this device? Is it a DIY job?
Any guidance greatly appreciated.
connector_2.jpeg
connector_2.jpeg (38.81 KiB) Viewed 992 times
by januwan
09 Aug 2026, 23:37
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: PO172 97 850 NA
Replies: 11
Views: 1850

Re: PO172 97 850 NA

Thank you for the feedback. I patched the crack in the elbow, but it did not fix the problem. I also found other issues. There is a lot of oil behind/below the manifold, and I failed the glove test. Next weekend I will be doing it for the third time. Second, because the kit I bought contained URO ...
by januwan
02 Aug 2026, 11:04
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: PO172 97 850 NA
Replies: 11
Views: 1850

PO172 97 850 NA

Just got the PO172 code. I was checking my vacuum lines and found a small crack in the elbow that connects to the passenger-side manifold. Is it possible to replace this elbow without removing the manifold?
I also want to clean the MAF sensor, but I don't have the wrench for the star bolt with the ...
by januwan
14 Apr 2024, 14:47
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: PO 412 code
Replies: 5
Views: 673

Re: PO 412 code

The first thing was to check all the connections again. And of course, I found one that wasn't connected. After plugging in and clearing codes everything is fine.
Operator error. I apologize for wasting the time of all 70 members reading this thread. The only lesson one could learn is to take ...
by januwan
13 Apr 2024, 18:54
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: PO 412 code
Replies: 5
Views: 673

PO 412 code

After replacing the starter I noticed the Check Engine light. Quickscan revealed code 412 (Secondary Air Injection System Switching Valve A Circuit Malfunction). It may not be related but I made a mistake connecting only 3 cables to the starter on my first attempt (the starter did not turn). After ...
by januwan
23 Mar 2024, 00:09
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: ignition switch replacement
Replies: 20
Views: 1996

Re: ignition switch replacement

Got one from Amazon for $67, thanks for the recommendation.