Help ! Service Engine Soon Fault Codes 2882 and 2883

I have a 2006 X3..

Last week i got this Service Engine soon light on the panel

So i took it to BMW dealership...for checkup
and that's what the technician found out ..

46077 Permanent malfunction within both before cat oxygen sensors.
Verified SES light illuminated. Performed vehicle test, found fault
codes 2882 bank 1 fuel trim(lean mixture) and 2883 bank 2 fuel
mixture(lean mixture). Smoked tested intake system, inspected for
leaks, no leaks present in intake system. Performed function check of
HFM, found HFM operating within specification. Performed function check
of both before cat oxygen sensors, both reading at 1.5(operating
specification between 0.0-1.1). Test plan prompted to replace both
before cat oxygen sensors.

They are quoting almost $1200 for this job.. Is it fair..
I checked the price of OEM Bosch Sensors online i can buy it for around $200..

Do you think by just replacing sensors it will solve the problem.. as i was reading the forums that just replacing the sensors won't solve this problem some body has also mentioned about changing CCV .. do i need to do that too.. ???
Please read the diagnose above and guide me..

How many miles do you have on the car?

Just 45000 miles

O2 sensors seems a bit premature based on your milage? Are you in California? If so this should be covered by the emissions warranty.

Definitely not the O2 sensors. They rarely fail and impossible they both fail. And if they fail, they report a rich condition because they generate no voltage as opposed to 1.5V (indicating excessive O2 in the exhaust, symptomatic of a lean condition)

If you have a lean condition on both banks you have a vacuum leak (that is unmetered air into the intake) It's one of two things: either the rubber intake boot where it branches of to the idle control valve or the crankcase ventilation system.

Since the diagnosis was wrong, I have no confidence that they did the smoke check accurately so I would still check the intake boot. Diagnosing the CCV it's a bit more complicated, but if you pull the oil cap and feel a strong vacuum than it's gone, although the plumbing cracks as well so the valve itself could be working, but still sucking in air from elsewhere. In my case neither of these tests was conclusive, but went ahead and replaced the entire apparatus and that solved it (this was some 20K miles ago, no problems since...)

Leave the O2 sensors alone for now (that, btw, amazon has them for $60 bucks) and run from whoever tells you to replace them. Also run from whoever tells you it's the air flow meter: again it doesn't brake and when it does the car runs rich, not lean.

Thank you guys ..

Yes i am in California but dealer didn't mention that this is covered in Emissions Warranty or anything they just gave me an Estimate of $ 1200 to replace both before cat oxygen sensors

So lpcapital I will take my car to the Local repair shop .. What you suggest i ask him to check.. Intake boot ?? and CCV ??

My bet is intake boot but ccv is possible but less likely. The service advisors tend to never like to own up to warranty items on older cars.

If car is still at dealer call their bluff now that you know that their initial diagnosis is under warranty. It won't take long for the diagnosis to change. Have some fun with them...then go to a Indy....this issue is so common with the m54 motor at this age the dealer should be ashamed at the misdiagnosis.

Thanks Brian !!

On your advice i just wrote a letter to BMW customer service to see what they say about Emission warranty...

Let's see that they say ..

I just searched that the Intake Boot problem is related to P0171 and P0174 OBD codes

http://www.bimmerfest.com/forums/sho...d.php?t=499471


So not sure if that's the reason... MY Fault Codes are 2882 and 2883 ??

Originally Posted by monkonmission

I just searched that the Intake Boot problem is related to P0171 and P0174 OBD codes

http://www.bimmerfest.com/forums/sho...d.php?t=499471


So not sure if that's the reason... MY Fault Codes are 2882 and 2883 ??

They are the same: the P codes are ISO codes, the one you mention are BMW proprietary codes.

Originally Posted by monkonmission

Thanks Brian !!

On your advice i just wrote a letter to BMW customer service to see what they say about Emission warranty...

Let's see that they say ..

As a side...

I only meaning o2 sensors are required to be covered by CARB. The intake boot is on you.

Originally Posted by monkonmission

So not sure if that's the reason... MY Fault Codes are 2882 and 2883 ??

The description for (the very rare) P2882 and P2883 seems to be the same as for the much more common P0171 and P0174.

Wonder what the purpose is of the P2882 and P2883 from BMW's point of view.

If the car seems to be running fine, might be worth having your independent tech. erase the codes and then see if they come back, and under what operating conditions (e.g. cold start, full throttle, etc.).

Small chance that they were just an electronic gremlin and won't return.

But if they do, one quick thing to rule out is an aftermarket air filter - they have been reported to cause the P0171 and P0174 codes.

Changed your usual gas station recently?

Other than that, it can be a hard one to chase down and often ends up being the crankcase vent valve.
If your low 46K miles involved a lot of very short commutes or shopping trips, that could be a good possibility.
But even so, a few E46 owners have done that as a last resort and still not fixed the SES light.

Originally Posted by x3brian

As a side...

I only meaning o2 sensors are required to be covered by CARB. The intake boot is on you.

Just got a reply from the dealer they said your X3 is not covered under Emissions Warranty

Only M Series comes under Emission warranty ..
Not all vehicles are under warranty

Now i talked to BMW Customer Service and they confirmed that the Oxygen Sensors are not covered under Emissions warranty for my 2006 X3..

I see that the Oxygen Sensors are covered under warranty for 2010 X3 for 8 years 100,000 miles whichever comes first..

I misread as it states it twice and two ways. I was looking at page 7 that says change o2 sensors at 150k if vehicle eligible for California emissions.

The picture is page 39 and there is fine print that this warranty only kicks in if you fail smog before year 8 or 100k miles. Technically these CEL would cause a fail in California for a smog check but I digress...

That's said. But it's not the O2 sensors so I wouldn't worry about it too much....

Originally Posted by x3brian

I misread as it states it twice and two ways. I was looking at page 7 that says change o2 sensors at 150k if vehicle eligible for California emissions.

The picture is page 39 and there is fine print that this warranty only kicks in if you fail smog before year 8 or 100k miles. Technically these CEL would cause a fail in California for a smog check but I digress...

TExt from BMW 2006 Service and Warranty Booklet

For 7 years or 70,000 miles whichever occurs
first:
If an emission-related part listed in this Warranty
Section specially noted with coverage for
7 years or 70,000 miles is defective, the part
will be repaired or replaced by BMW NA. This is
your long-term emission control system DEFECTS WARRANTY

Originally Posted by lpcapital

That's said. But it's not the O2 sensors so I wouldn't worry about it too much....

I just went to the local technician .. He has reset the codes and now there's no Service Engine Soon light.. He advised me to drive for 50- 100 miles and see if the Engine light comes back again..
Even he was baffled with the situation that how both the sensors can go bad at the same time..
Even he was sure that this is not Sensors problem.. Dealer is just ripping me off..

Originally Posted by monkonmission

I just went to the local technician .. He has reset the codes and now there's no Service Engine Soon light.. He advised me to drive for 50- 100 miles and see if the Engine light comes back again..
Even he was baffled with the situation that how both the sensors can go bad at the same time..
Even he was sure that this is not Sensors problem.. Dealer is just ripping me off..

Why do you think people on this board refer to them as stealers.

SO with the 2883, 2882 codes replace the Lower intake boot first, cause I tested my pre cat o2 sensors and they had resistance still so it's not that and I do have a K&N CAI installed and I heard the oil can get on the MAF sensor, I just reset the codes today and I want to see if it comes back. My lower intake boot "appeared" to be in working order. I also have a 281e(variable intake system: activation) SO that looks like K&N intake for sure, just looking for more insight to what I might want to repair if codes return. Thanks guys.