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Code P0350

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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RickHaleParker
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Re: Code P0350

Post by RickHaleParker »

Any course of action with this information is welcome.

Whatever is causing this is spread out across the coil packs or common to all five coil packs. I would start with the connections to the coil packs. Because they are easy to get to and it doesn't cost anything to clean and tighten them.

Keep in mind the bolts on the coil packs are one of the three grounds on each coil pack, if they are not getting good electrical contact, it could be the source of the problem. All three grounds are physical common to all the coil pack at the ends away from the coil packs.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

obayha
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Post by obayha »

abscate wrote: 12 Jan 2018, 13:43 Did you do a thoroughly cleaning with a hexane based Throttle Body Cleaner?
This I have not done yet..
Sorry, As I have been away from electronics for the weekend. Drove home Friday with light on, car parked all weekend and on Monday, no light on as I drove 50 miles to work. The only work done, was a radiator change during Christmas. It all comes out the bottom, but I am wondering if I moved something I shouldn't?
Question? Does the O2 sensor stick in a place up front? Mine just hangs out. Noticed that as I was changing the Radiator.

Hexane? Is this a MAF cleaner?
Shane
1998 V70 T5 331,000 :( Her last day was on 3 cylinders.
New to me 1999 V70 NA 163,000 Now at 217,000
2006 V70 2.5T in driveway (WIFE'S)
1982 Toyota FJ40 Land Cruiser

scot850
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Post by scot850 »

O2 sensors are screwed into the down-pipe for the exhaust at the back of the engine and the 2nd in the catalytic converter further back under the car. If it is at the front of the engine near the radiator you really have a problem. It may be you have mistaken the engine ambient air temp sensor that mounts into the side of the front under tray on the RHS of the radiator and points into the area at the front of the radiator. There is a 2nd air temp sensor for the inside temp gauge that usually mounts into the LHS lower plastic grille.

I think unless this is broken it is unlikely to be the issue. i have found them hanging in mid air and working fine.

The more likely issue is that you may have not re-connected something correctly or at all. Check around the area of the radiator for loose connectors or wires un-attached.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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abscate
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Post by abscate »

obayha wrote: 15 Jan 2018, 10:14
abscate wrote: 12 Jan 2018, 13:43 Did you do a thoroughly cleaning with a hexane based Throttle Body Cleaner?
This I have not done yet..
Sorry, As I have been away from electronics for the weekend. Drove home Friday with light on, car parked all weekend and on Monday, no light on as I drove 50 miles to work. The only work done, was a radiator change during Christmas. It all comes out the bottom, but I am wondering if I moved something I shouldn't?
Question? Does the O2 sensor stick in a place up front? Mine just hangs out. Noticed that as I was changing the Radiator.

Hexane? Is this a MAF cleaner?
Shane
MAF or throttle body cleaner will work

I think you dangling sensor is a temp sensor as Neil pointed out above
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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obayha
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Post by obayha »

Thanks everyone. It probably is the air sensor. Let it dangle.
I will jack it up as soon as weather permits. It's not cold compared to other places north, But my bones don't like the driveway like they use to.
Shane
1998 V70 T5 331,000 :( Her last day was on 3 cylinders.
New to me 1999 V70 NA 163,000 Now at 217,000
2006 V70 2.5T in driveway (WIFE'S)
1982 Toyota FJ40 Land Cruiser

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RickHaleParker
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Post by RickHaleParker »

But my bones don't like the driveway like they use to.

Craftsman 40 in. Creeper with Metal Frame, $29.99 at Sears online.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

obayha
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Post by obayha »

RickHaleParker wrote: 15 Jan 2018, 12:37 But my bones don't like the driveway like they use to.

Craftsman 40 in. Creeper with Metal Frame, $29.99 at Sears online.
Cardboard that I have used on a few projects. You can slide around on it like ice.
I am calling this solved for now. No CEL in two days, so I will clean the ETM and see what happens. PO350 with no other codes, could be a confused ETM from it being gummy! :D
Just a thought.
Shane
1998 V70 T5 331,000 :( Her last day was on 3 cylinders.
New to me 1999 V70 NA 163,000 Now at 217,000
2006 V70 2.5T in driveway (WIFE'S)
1982 Toyota FJ40 Land Cruiser

scot850
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Post by scot850 »

Could be. When cleaning the ETM don't go crazy with the cleaner and spray it into the throttle body unless you want to pay for a re-build! I recommend a lint free cloth and soak it in cleaner and wearing gloves, wipe it all down to clean. If you have stubborn areas, leave the cloth on that area and leave for a a while.

Good luck with that and long may the CEL stay off!

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

obayha
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Joined: 18 April 2009
Year and Model: V70 1999 Base
Location: north carolina
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Post by obayha »

Thanks Neil,
Good idea on the cleaning of the opening. Sort of did it that way with the carb cleaner. I want to run this car as long as I can without much work or expense.
Shane
1998 V70 T5 331,000 :( Her last day was on 3 cylinders.
New to me 1999 V70 NA 163,000 Now at 217,000
2006 V70 2.5T in driveway (WIFE'S)
1982 Toyota FJ40 Land Cruiser

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