Check Engine light is on. Code reads ECM2210. Mechanic states, "Rear O2 sensor slow code. ECM 2210."

As I look for a replacement sensor, does anyone recommend a brand? And is this difficult to do? I have only done minor mechanical repairs but from the internet research I have done it looks like something I could do within the labor day weekend instead of paying the estimate of $312.54 Do I have to buy a special tool to remove the bad sensor?

Thanks for any help. PS I'm a new member who just purchased a 2002 s60 2.4 with 55,000 miles. It is black and cost me $12,500. I like it very much so far, but had to replace the original battery the first week I owned it! Ok I'm done rambling now. Thanks!

 

Try to Buy a Bosch one Same as OEM one.

It is pretty easy to do.

You really should buy an O2 sensor socket to remove the old one and install the new one.

 

Thanks Tech! I'll reply back my progress. Then with the $$ I saved from doing the repair myself I'll expand the size of my liquor cabinet.

 

****Update****

After a lot of price comparison, I purchased the Bosch O2 sensor for $82.44 plus 6% FL sales tax for a total of $87.39.
Tech was right, pretty easy to do, there was more room around the sensor then I thought there would be. I couldn't find an O2 sensor socket at Sears, so I bought a 22mm wrench and will return it tomorrow. I replaced the sensor with the connectors provided, unplugged the negative terminal in the trunk for an hour and it runs wonderful without a check engine light. By the way before the replacement I was getting 27.9 mpg. I'll reply a post to report my new mpg in a few weeks. I know for most of you this is a pretty easy task, but for a greenhorn like myself I'm thrilled to save $312.54 - $87.39 = $225.25! My job is in Quality Control so I'm trained to take accurate notes and recordings of all data and information on projects that I do. If anyone wants my notes for "Rear O2 Sensor Replacement" contact me and I'll attach them for you.

Just a few (more) comments: The old sensor was not a Bosch but in fact a Denso. It says "Volvo" on it too, so I'm pretty sure it was the original.

 

Usually they are Bosch.
Maybe a Fluke few Denso's out there.

 

****Update****

It has been over 2 months since replacing the Rear O2 sensor and I now get 29.1 miles to the gallon a difference of 1.2 MPG. It may not sound like much but the math goes like this:

Price of 1 gallon of gas divided by new miles per gallon: $2.35/29.1 = $.08 per mile
Price of 1 gallon of gas divided by old miles per gallon: $2.35/27.9 = $.085 per mile
A savings of $.005 per mile
Savings price per mile multiplied by my weekly commuter trip miles: $.005 x 450 = $2.25
Weekly savings price multiplied by 52 weeks in a calender year: $2.25 x 52 = $117.00!!
Therefore the Bosch O2 sensor will pay for itself after 39 weeks of installation!!
But it gets better!!

Number of months left of financing car multiplied by monthly savings from installing sensor: 56 x $9.75 = $546.00 saved during financing
Amount saved during financing divided by price of monthly car payment: $546/$261 = 2.10

If all is kept constant, installing the Bosch O2 sensor will actually pay for two (2) months of my car payments!!!
Later this week I will be installing new spark plugs (Bosch of course) and an air filter. More data on that to come. wow I am such a nerd.[&o]

 

Glad it is all better now.

 

Tech I have a 2001 S60 2.4T LUKE8_8 said his O2 sensor was around $70 but his is not turbo. Should I be able to find one for that price. The least expensive I found was at Parts Bin for $143.95 Bosch but not OE sku#BS17070. How do you know if it is the one in front of the C-converter or behind? Thanks for any reply. mstrplmber

 

would love to have your notes on this!

 

very old thread here. Original post was from 2006, prior post was from 2009. Best to pose your question in a new post and include stuff like what make and model are you asking about. As a side bar, the original query was regarding a replacement for the rear O2 sensor. The job of the rear O2 sensor is to measure cat converter efficiency by testing the exhaust after the cat. You can shop around for different brands etc but the likelyhood is its not the sensor but there's a reasonable probability that its your cat converter that's not doing the job, depending on what code you are getting. Either the code is saying the signal is missing (ie an open or short circuit) or its out of range - which may in fact be due to the cat not the sensor.

 

Thank you for the info.... I have a 2005 V70 R... This is what I call my forever car and I'm having trouble with this O2 sensor.... And when I say I, I mean my mechanic who is pretty good on Volvos but this has really got him stumpted..

 

what is the OBD2 code being presented? When it comes to O2 sensors there's really a standard design for the sensor - the rest is the wiring harness that is model specific. For that generation car, they use a four wire sensor - two wires for the sensor heater element and two wires for the signal. Depending on what goes wrong, a different code will show. Your car also has a front sensor ahead of the cat converter (sometimes called the lambda sensor since it controls fuel trim based on measured O2 in the exhaust) and a rear sensor after the cat which is used to measure remaining O2 after any HCs have been converted. If the rear sensor signal disagrees with what the ECU expected, a code will be set. If the rear sensor shows no signal or a full signal voltage (ie an open circuit or a short) different codes get set. If the heater circuit shows no or full voltage, a different code gets set. The one to be concerned about is the P0420 or P0430 code which is the cat efficiency code that says the converter isn't doing the job. You can try replacing the sensor but more likely your converter is contaminated or failed (particularly if the car is consuming oil or coolant). The rear sensor doesn't impact the way the car runs or drives its really for emissions.