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Evap Codes P0446 P0453 - Rough Start

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

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

KEWROCK
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Year and Model: V70R 1999
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Evap Codes P0446 P0453 - Rough Start

Post by KEWROCK » Sat Dec 05, 2009 6:12 pm

1999 V70R
Check Engine light is on. Codes p0446 & p0453 come up.
P0446 is Evaporative Emission Control System Vent Control Circuit Malfunction.
P0453 is Evaporative Emission Control System Pressure Sensor High Input.

Car has a rough, sloppy start when key is turned every time. Also fuel tank won't take fuel if car is not running. If I do fuel up with the engine off as some stations require I can get it to dribble in, after fueling car has to crank 6-8 seconds to start. Other than that the car runs great. It's been like this for two years now, but my contact for hacked inspection stickers is gone now. I will have to pass an legit emissions test.

Are these problems related to the codes(Probably I suppose). Can anybody offer any advice on a DYI repair?..........Thanks, Rocco
1999 V70R T5 AWD Red

RichSad
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Year and Model: 1999 v70 xc
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Re: Evap Codes P0446 P0453 - Rough Start

Post by RichSad » Tue Mar 09, 2010 4:18 am

Just found this post. This is similar to a problem I am having on a 99 v70xc. Did you solve this?

claymore850
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Year and Model: 850 T5, 244, V70 2.4
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Re: Evap Codes P0446 P0453 - Rough Start

Post by claymore850 » Fri Apr 02, 2010 8:36 pm

I had this problems a few years ago...the evap valve is the problem, (suddenly dies at high way speed, rough idle..??) this is a one way valve (in the front drivers side next to the fan) when it became wrong.it lets pass the recirculation gases in two ways..

Its to easy and cheap to change.... look this link on the ebay..

http://cgi.ebay.com/ebaymotors/Volvo-Or ... 335b7685dc

KEWROCK
Posts: 140
Joined: Tue Sep 25, 2007 10:59 am
Year and Model: V70R 1999
Location: NYC
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KEWROCK

Re: Evap Codes P0446 P0453 - Rough Start

Post by KEWROCK » Thu Aug 18, 2011 7:47 am

>>>>>Check Engine light is on. Codes p0446 & p0453 come up.
P0446 is Evaporative Emission Control System Vent Control Circuit Malfunction.
P0453 is Evaporative Emission Control System Pressure Sensor High Input.<<<<<<

Another two years with the engine light on. Finally solved. I replaced the "Purge Valve" mounted on the top driver side corner of the radiator underneath the air duct. 5 minute repair, no tools. Two small vac hoses and one wire plug. Part was under $30us. I do not have a part number, but the guy at MY VOLVO PARTS ONLINE(or whatever their new name is) knew exactly what it was.

It's been two months now, engine light is off, no codes stored. It's ready for an inspection.
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1999 V70R T5 AWD Red

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