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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 04-17-2017, 06:21 AM
Ajay06 Ajay06 is offline
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Location: Toronto
 
Join Date: Jan 2017
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Mein Auto: BMW e83
Help: CEL light, code P0171 and P0174

Hi everyone,

I have the CEL light come on after 175kms of clearining it. I also notice a small stutter when stopped at a red light.

The codes are :
P0171 System too Lean Bank 1
P0174 System too Lean Bank 2

I have done some work recently on the car, which include:

CCV replacement- valve and hoses
Bosh ignition coils
Bosh spark plugs
cleaned throttle control body
cleaned idler control valve
cleaned MAF
new thermostat
new coolant expansion tank
rocker cover gasket
new rubber intake boot

Thanks!

Ajay
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  #2  
Old 04-17-2017, 06:24 AM
swampX3 swampX3 is online now
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Location: New Orleans
 
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Mein Auto: bmw++many
0171 and 4 ....smoke it / read these links/ post your model and engine

http://www.bimmerfest.com/searchresu...91j14954123j13
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  #3  
Old 04-17-2017, 06:26 AM
swampX3 swampX3 is online now
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diy ...mini smoker

>make this by tonight ! ....easy diy .....best wishes

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  #4  
Old 04-17-2017, 06:27 AM
swampX3 swampX3 is online now
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good links to see how your repair shows up on a computer setup etc

https://www.youtube.com/channel/UCml...rch?query=0171

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  #5  
Old 04-17-2017, 01:13 PM
kaptainkremmin kaptainkremmin is offline
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Location: s****horpe
 
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Posts: 135
Mein Auto: 320d
I've seen a clear and reset procedure on you tube for the CEL light what clears the code if alls ok, but it will return if fault persists, disconnect both battery leads and touch them together then replace them.
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  #6  
Old 04-19-2017, 07:58 PM
aviatebimmer aviatebimmer is offline
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Location: Indonesia
 
Join Date: Mar 2017
Posts: 5
Mein Auto: X3 E83
Quote:
Originally Posted by kaptainkremmin View Post
I've seen a clear and reset procedure on you tube for the CEL light what clears the code if alls ok, but it will return if fault persists, disconnect both battery leads and touch them together then replace them.
hi, how would you do that? with the car on or off?
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  #7  
Old 04-20-2017, 08:03 AM
noego noego is online now
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Mein Auto: '06 X3, 1997 Chevy truck,
Quote:
Originally Posted by aviatebimmer View Post
hi, how would you do that? with the car on or off?
With the car running/on. If you disconnect the battery and the engine stops there is something else wrong - terribly wrong!
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  #8  
Old 04-20-2017, 10:20 AM
kaptainkremmin kaptainkremmin is offline
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With the car stopped, with your key in your pocket remove both battery leads, now with both leads in your hand touch them together then put them back on the battery, don't shoot the messenger I'm just telling you what I watched on you tube.
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  #9  
Old 04-20-2017, 10:23 AM
kaptainkremmin kaptainkremmin is offline
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This is what I watched
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  #10  
Old 04-20-2017, 10:32 AM
kaptainkremmin kaptainkremmin is offline
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This video shows you all the reasons why you get a CEl light
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  #11  
Old 04-21-2017, 06:52 AM
abscate abscate is offline
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Mein Auto: 2006 BMW X3... VOLVO... V
Quote:
Originally Posted by noego View Post
With the car running/on. If you disconnect the battery and the engine stops there is something else wrong - terribly wrong!
Sarcasm of course.

Disconnecting battery with the engine running will usually blow alternator diodes.

Engine off, key out, disconnect ground first, then positive

Cover battery so leads can't find the terminals

Touch and hold and count the first 30 perfect number backwards. If you don't know these from memory, just sing the Jeopardy theme.
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  #12  
Old 04-24-2017, 06:11 AM
tedX3 tedX3 is offline
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Location: philadelphia pa
 
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Mein Auto: BMW X3
Lean could be a air leak, air not measured. This could be a cracked rubber intake boot.

I has a similar issue, after replacing the air flow sensor a few times might have finally solved it. Seems not all air flow sensors work properly. I actually bought a used air flow sensor, seems to work better than the last couple new ones I bought. I found they range in price from about $45 to over $200.
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