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Old 01-09-2017, 07:32 PM   #1
330idriver
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Error codes question/10 codes at once

Last week the Service Engine Light went on. This weekend I hooked up my Peake reader and got 10 error codes as follows:
2 for Oxygen Sensor Adaptation Limit
2 for Catalytic Converter Efficiency
6 for Misfire (each cylinder)

What does this mean? Is this a sign of an intake leak somewhere?

I used CRC MAF cleaner this weekend and reset that codes, but they all came back again today.

Last summer I replaced all 6 coils, spark plugs and all four O2 sensor with new Bosch so I will rule those out. My car feels fine. I have no starting, idle or performance issues. It's freakin' cold out.

Hoses I could see looked ok.
Do I start with the DISA?
I do not want to start randomly replacing stuff if it ain't broke.

Any intelligent experienced based feedback is appreciated.
Thanks
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Old 01-10-2017, 08:16 AM   #2
markusmarkus
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The first place I'd look is for system voltage. Google "BMW E46 hidden OBC functions." Test #9 will show you the voltages. If those read ok then I'd start looking for vacuum leaks. Also, test the fuel pressure. There's a test valve on the fuel rail. The pressure needs to be 50psi or so at all engine speeds. Also, does the gasoline contain ethanol? What percentage? You may have some water in the fuel.


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Old 01-11-2017, 08:30 AM   #3
330idriver
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Update; Checked the system voltage. everything is fine. I think all gasoline in the northeast contains ethanol (10% or 15%). I only use high quality gas; usually Sunoco or Exon Mobil. I opened the hood to listen for any DISA rattle and discovered that my oil dipstick was not completely inserted. I am guessing this would have been a major source of a vacum leak. Could this have caused the issue? I feel like a dumb a$$ .
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Old 01-11-2017, 09:05 AM   #4
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Yup, that'll do it. Btw, don't use Sunoco gas as its cleaning chemicals aren't up to snuff. Buy gas from a station that sells top tier gas. Try www.toptiergas.com.


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Old 01-11-2017, 10:51 AM   #5
330idriver
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Thanks. I could have sworn Sunoco used to be on the "BMW Approved" list many years ago.
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Old 01-11-2017, 12:10 PM   #6
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Quote:
Originally Posted by 330idriver View Post
Update; Checked the system voltage. everything is fine. I think all gasoline in the northeast contains ethanol (10% or 15%). I only use high quality gas; usually Sunoco or Exon Mobil. I opened the hood to listen for any DISA rattle and discovered that my oil dipstick was not completely inserted. I am guessing this would have been a major source of a vacum leak. Could this have caused the issue? I feel like a dumb a$$ .
Dipstick being not fully seated can cause a vacuum leak, but will not cause the original problem(s) you had with as many codes as you had.

Might cause a P1188/P1189, but not P0171/P0174 and misfiring.
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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, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose temp switch O-ring - BMW #13621743299
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Old 01-11-2017, 12:11 PM   #7
CylonRed
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I highly doubt gas is the issue unless there are storage issues. No need to use 'BMW approved' gas and as far as I am concerned - Top Tier is marketing - so it is not mandatory.
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Old 01-11-2017, 04:08 PM   #8
330idriver
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I will reset/clear the codes tonight and see what happens. Thanks for the feedback folks.
I may replace the DISA eventually anyway since it is an original 16 year old part, which is not too expensive and appears like an easy preventative maintenance DIY.
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Old 01-12-2017, 06:44 AM   #9
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If codes come back, post Freeze Frame info. For the short term watch the Long Term Fuel Trims, anything close to 10% is a problem.
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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, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose temp switch O-ring - BMW #13621743299
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Old 01-12-2017, 09:11 AM   #10
BaliDawg
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Quote:
Originally Posted by 330idriver View Post
I may replace the DISA eventually anyway since it is an original 16 year old part, which is not too expensive and appears like an easy preventative maintenance DIY.
At the least remove the DISA and test it.


First buy a replacement o-ring like this.
https://www.ebay.com/itm/111561787012
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