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Cannonbear
 
smog problem, 03 bmw 2.5i

ok, had a bank too lean code, fixed 02 sensors and that seemed to fix the problem. now when i goto smog, their obd2 reader wont pass me because it says the o2 sensors arent working.

i have no idea what to do next, as my smog levels are fine, it's just i can't pass the damn "check lights", apparently i only need to get this working to pass.

any idea what to do? is there another way to clear codes? i've tried driving around for a long time as well, per bmws recommendation.
Old 09-02-2011, 09:28 AM Cannonbear is offline  
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Jehannum
 
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Go find a cheap OBD-II reader and clear the codes yourself. After that, drive around for a good while and you'll be set.
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Old 09-02-2011, 11:00 AM Jehannum is offline  
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grjr
 
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Pepboys can clear the codes for you at no charge. Also, you can clear the codes, but if there is a problem the codes will simply come back until the problem is fixed.

edit:
somehow missed that you had the problem fixed, whoever fixed the problem should have cleared the codes for you
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Old 09-02-2011, 11:13 AM grjr is offline  
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Cannonbear
 
k, codes were cleared, but the smog equipment still shows "o2 sensor inc".

no clue what to do, smog tech tells me to go back to mechanic, i just don't get why the o2 sensors arent "on", even after driving a long time.
Old 09-02-2011, 11:53 AM Cannonbear is offline  
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Thermo1223
 
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I bet you need the special BMW tool to really clear them.
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Old 09-02-2011, 12:27 PM Thermo1223 is offline  
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[H]ard|On
tell me i is retarded and i will just potato
 
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Did you replace them with the correct sensors?

This isn't about clearing anything. This is about either you not driving long anough AFTER clearing codes or incorrect sensors.
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Old 09-02-2011, 12:31 PM [H]ard|On is offline  
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Jehannum
 
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Quote:
Originally Posted by Cannonbear View Post
k, codes were cleared, but the smog equipment still shows "o2 sensor inc".

no clue what to do, smog tech tells me to go back to mechanic, i just don't get why the o2 sensors arent "on", even after driving a long time.

Which sensors was it bitching about (pre-cat or post-cat)?

Bank too lean could mean any number of things that don't have shit to do with the O2 sensors. If the O2 sensors aren't suspect anymore, then you've got un- or mis-metered air coming into the system from somewhere.
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Old 09-02-2011, 12:46 PM Jehannum is offline  
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Lurker
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Quote:
Originally Posted by Cannonbear View Post
k, codes were cleared, but the smog equipment still shows "o2 sensor inc".

no clue what to do, smog tech tells me to go back to mechanic, i just don't get why the o2 sensors arent "on", even after driving a long time.

You have to drive approx 50 miles in varying conditions before the ECU is ready for emissions.
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Old 09-02-2011, 12:52 PM Lurker is offline  
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[H]ard|On
tell me i is retarded and i will just potato
 
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Quote:
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You have to drive approx 50 miles in varying conditions before the ECU is ready for emissions.

^ this

Im waiting for him to answer my Q
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Old 09-02-2011, 12:54 PM [H]ard|On is offline  
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someone else
 
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^ this

Im waiting for him to answer my Q

yes, so you can come to the aid of BMW so that they are not blasphemed with "electrical problems" or anything short of 100 per cent reliability.
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Old 09-02-2011, 06:33 PM someone else is offline  
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Tex Arcana
I am a mean disrespectful person hiding anonymously and need an attitude adjustment.
 
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this is your problem:

Quote:
Originally Posted by Cannonbear View Post
03 bmw 2.5i

This is your solution:






Or the $10k special service tool from BMW to fix it.

Either way, you're screwed.
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Old 09-02-2011, 07:37 PM Tex Arcana is offline  
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grjr
 
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Quote:
Originally Posted by Cannonbear View Post
k, codes were cleared, but the smog equipment still shows "o2 sensor inc".

no clue what to do, smog tech tells me to go back to mechanic, i just don't get why the o2 sensors arent "on", even after driving a long time.

o2 sensors are "on" it is just that the computer hasn't finished running its tests on that system to check it off its list
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Old 09-02-2011, 10:46 PM grjr is offline  
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d114
 
It is obvious that you have a lean condition caused by incorrect and/or no readings on the o2 sensors. Do you realize that the o2 sensors must be heated to a high temperature for them to work properly? Specifically for German engineered vehicles, this entails a mandatory high speed run on the autobahn, at a minimum velocity of 45 metres per second. (160km/h) You must exceed this speed and sustain it immediately prior to the smog check. As there is no 'autobahn' stateside, you must use your hazards whilst on the freeway so the police know you're calibrating your oxygen sensors.

This is why many BMW owners are mistaken as douche bags. As they attempt to 'calibrate' their oxygen sensors, they often forget that other vehicles such as those made by quality auto manufacturers such as hyundai require no such calibration. Perhaps someday the normal layperson will come to the realization that VANOS must kick in, yo.
Old 09-02-2011, 11:40 PM d114 is offline  
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[H]ard|On
tell me i is retarded and i will just potato
 
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Quote:
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yes, so you can come to the aid of BMW so that they are not blasphemed with "electrical problems" or anything short of 100 per cent reliability.

The fuck are you on about...
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Old 09-03-2011, 03:47 AM [H]ard|On is offline  
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Cannonbear
 
drove 100 miles the day i got sensors replaced, replaced all three.

drove a week, usually 50 miles a day for usual business, figured that was long enough. o2 sensors still aren't 'on', day of smog i drove 100 just to do it, kept gas tank around 3/4 full per bmw suggestions, i dont know how much more i can drive this POS.

i get the same answer, "drive more, they need to calibrate/heat up."

Not sure what else to do.
Old 09-03-2011, 11:24 AM Cannonbear is offline  
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