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Old 12-16-2012, 08:44 PM   #61
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Be careful when interpreting your measurements as it may be possible that the DME about could PWM (Pulse Width Modulate) the control of the ground side of the sensor. This could be a fast PWM or a slow PWM that is a on for "X" seconds and off for "X" seconds.

I have never had to look at the DME control behavior, but just be careful you do not get mislead by some unusual switching of the heater circuit.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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Old 12-16-2012, 10:37 PM   #62
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Well I am happy to report that the O2 heater monitor just set after a drive to the store. I can finally get an inspection 6 months later.
It appears that replacing the bank 1 pre cat sensor today did the trick for that system.
I'd like to thank both of you guys who helped me trouble shoot and diagnose this car.

For future viewers that come across this through searching...The key notes I would take from all this are:
-Check vacuum lines(fuel filter to intake and the line behind the motor that goes to secondary air pump valve)
-Ensure o2 sensors are connected to the right location. I have read people saying, in other threads, that post cat location does not matter-It does!
-Check for loose o2 sensors
-Use a data logging obd tool to graph o2 sensors. I used Torque Pro, exported a csv file, opened in excel, then created a chart. This allowed us to notice 2 lagging sensors that otherwise may have went undetected
-Battery voltage and engine temperature matter for obd monitors
-Make sure SES light comes on when you put the key in the ignition before buying a car!

This is what was between my dash and the led board blocking my SES light

Last edited by jessehell; 12-16-2012 at 10:42 PM.
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Old 12-16-2012, 10:52 PM   #63
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Glad you finally got this far.

Once you get your car inspected, I would reset the DME and watch and see how the quickly the monitors set and find out if you still have an issue with the Evap system.

When you get everything cleared, start to watch and make sure you long term fuel trims are less than 3%. This is my goal. Anything above 3% in my opinion means you are a bit too lean and you are getting closer to the threshold that will trip the first set of lean codes.

Update the thread once you are inspected, get a chance to reset your monitors find out what you long term fuel trims are looking like.

Congrats for hanging in there. One stupid mistake by someone long before you caused a much bigger headache and nightmare that you finally worked your way though.

Hopefully you can relax for the holiday and pick up on other things in the Springtime once it warms up!
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299

Last edited by jfoj; 12-16-2012 at 10:53 PM.
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Old 12-17-2012, 09:54 PM   #64
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Originally Posted by jessehell View Post
Well I am happy to report that the O2 heater monitor just set after a drive to the store. I can finally get an inspection 6 months later...
It is great to see you persevere and succeed to fix the problem.
And I appreciate you for summarizing the problem and fix. I see only 10% or less follow up from fellow fanatics.

I second the jfoj's suggestion for erasing codes after getting the inspection.
It takes three consecutive tests without a fault to turn off a "check engine light" and 40 consecutive tests without a fault to clear any code from DME memory.

The reason I asked you to drive with the gas cap off (or any evap components like you did) was to see the status of evap monitoring by DME to find out if the evap codes you had were current codes or old codes that have not been cleared yet. They were old codes judging from the check engine light you had with a evap component disconnected, or what ever caused the pending codes should set a check engine light long time ago.

Last edited by dslboomer; 12-17-2012 at 10:05 PM.
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Old 03-08-2013, 05:32 PM   #65
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I have incomplete on my monitors. How long should i drive before i take it to garage. Its been 150 miles
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Old 03-08-2013, 06:32 PM   #66
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Quote:
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I have incomplete on my monitors. How long should i drive before i take it to garage. Its been 150 miles
i had to drive like 180 miles on highway. I followed the Drive cycle procedure and did it.
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Old 03-08-2013, 11:12 PM   #67
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So if i do that a few times then highway drive it for a few hours lol? F*ck my life mann
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Old 03-11-2013, 10:35 AM   #68
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Update: had 4 incomplete monitors before weekend. I now have 3. 1 less and i can get my etest!!!
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Old 03-12-2013, 08:20 PM   #69
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drive it for about 3 mins at 30 mph and then set the cruise to 55 mph for another 15-20 minutes. Do not brake(unless you have to), and dont go over 3k RPM. this is how i did my last 3 monitors . In NY it will pass even with 1 not ready.
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Old 03-13-2013, 05:46 PM   #70
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drive it for about 3 mins at 30 mph and then set the cruise to 55 mph for another 15-20 minutes. Do not brake(unless you have to), and dont go over 3k RPM. this is how i did my last 3 monitors . In NY it will pass even with 1 not ready.
Will do that tonight, have to drive 100 miles up the freeway tonight anyways.
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Old 03-13-2013, 10:11 PM   #71
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If i bought 2 precat o2 sensors off the internet used, i noticed they had bank 1 sensor 1 and bank 2 sensor 1 taped on each. Is it sensitive and needs to go in exact connector it came off or are they non connector specific?
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Old 03-14-2013, 02:34 PM   #72
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Anyone?
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Old 03-14-2013, 02:38 PM   #73
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Old 03-14-2013, 02:47 PM   #74
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Ok, feels as if the car sputters a little in every gear. Not a misfire. P1188 and p1189 pending. No cel. Could be an intake boot? Started after precats were welded in... Any thoughts? Could the o2 sims be in wrong connectors as i thought with the precats?
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Old 03-14-2013, 02:48 PM   #75
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Also if i have pending codes would that cause monitors to be incomplete?
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Old 03-18-2013, 02:04 PM   #76
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2000 and older cars can have 2 not ready monitors.

I PASSED!!! With bimmerguy055's sims i was able to rid the pesky cel. Great!

Any questions feel free to ask i went through drive cycles like 90.
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Old 10-01-2013, 01:06 AM   #77
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a fascinating read. I'll definatly have to bookmark it to refer to for my own codes forsure. Great Job @ Jesse for sticking it out. even though its almost a year old. Must feel good... and I'm definatly going to have to get the torque app and plug in forsure.
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