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O2 sensor

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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lhailah
Posts: 37
Joined: 4 November 2010
Year and Model: XC70, 1998
Location: new york

Re: O2 sensor

Post by lhailah »

jablackburn wrote:The rear sensor does nothing to control the fuel/air mixture - it simply monitors whether or not the catalytic converter is functioning properly. Do you have any other codes, EVAP system perhaps?
p0410 secondary air inject system malfunction.
p0141 o2s heater circuit malfunction 1/2
p0136 o2s circuit malfunction 1/2
I also had a few p0300 codes. i changed spark plugs, coil, rotor n cap and wires today, so those should go away.
Ozark Lee wrote:To Ihaila - My gut says that it is unrelated. The smell of fuel on startup says a bad fuel pressure regulator, perhaps a flooded EVAP cannister or a leaky injector. White smoke at startup is pretty normal until the car reaches operating temperature. Beyond that things get a bit deeper in the woods.

...Lee
no white smoke while driving however when i started the car the other day with the hood up i noticed substantial white smog coming from the fuel line on the top passanger side of the engine...I've started the car a handful of times since then and haven't seen it again(although not every time do i have the hood up)...but the odor remains..
is the evaporative canister also called the air pump, or are these two different things?

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