Problems & Fixes: Volvo Emissions

Emissions system on our Volvos: EVAP valves, purge valve, air pump, oxygen sensors etc. Catalytic converter topics are in the Exhaust category.

April 21, 2016

The Birth, Life & Death of an XC90 T6

Ok, that title was a little dramatic, but that’s the idea. MVS member XVTer bought a 2004 XC90 T6 a few years ago for his wife. In between the buying date and selling date he posted some of the best tune-up, Stage 0 and restoration info for XC90s I’ve ever seen. This is his XC90 T6 story. […]

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March 5, 2016

XC90 2.5T – Replacing Front O2 Sensor Step-by-Step

Need to replace your 5-cylinder XC90’s front O2 sensor? Use this nice XC90 O2 sensor DIY with clip connector info and photos. MVS Volvo Forum member joelq created this tutorial: The CEL on my 2004 XC90 with ~148k miles has been on with a P0134 code – “Oxygen O2 Sensor Circuit No Activity”. Pretty sure I’m […]

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February 26, 2016

2001 XC70 J-Hose Replacement Fix w Photos

MVS Contributor Eric aka deepsouth posts a DIY tutorial on replacing the evap J-hose on a 2001 XC-70, including photos: “Recently changed the evap J-Hose on a 2001 Volvo XC70 AWD. I’ve changed evap hoses on all forms of S/V70’s and 850’s but this was a new form of hell. The charcoal canister is above the rear […]

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September 25, 2014

1998 V70 AWD Front Oxygen Sensor Swap w Photos

MVS Forums contributor deepsouth shows us how a front O2 sensor swap is done on an AWD Volvo P80, including photos. This is a “from the top” DIY, meaning it’s how to do the front sensor swap access from the engine bay, not under the car. Outstanding. Just swapped the front O2 sensor on my 1998 […]

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June 17, 2014

Does the Air Pump (SAS) Really Do Anything?

My airpump has started to sound like a vacuum grinding up a cat. Of course, the noise only lasts a minute or so, then it stops and all is well. I guess I have 2 questions:

1. What does the air pump do?

I ask this because the car runs no different before the thing kicks in and no different after it shuts off.

2. If nothing changes regardless of this thing being on or off, do I actually need it? Can is be simply unplugged and ignored?

Some people may gasp and sputter at that last statement, this is an honest question looking for a direct answer…

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