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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 12-03-2012, 04:10 PM
Talh3 Talh3 is offline
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Location: Atlanta ga
 
Join Date: Nov 2012
Posts: 14
Mein Auto: 1997 540i
Help!!!!! Knock sensor and fuel trim codes

I installed a new thermostat last week, last night I finished replacing my valley pan , oil seperator and back hoses. Now I am having codes from the peak meter that weren't there before!! They are 06 , d4 knock sensor cylinder 5-6 , 06, 1b fuel trim ol additive cylinder 1-4, 06 , 23 fuel trim ol additive cylinder 5-8. Someone please help! Also will it hurt to drive the car with these codes? It seems to be running good. I am also still bleeding the system . Thanks , Tal.
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  #2  
Old 12-03-2012, 05:24 PM
edjack edjack is online now
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 8,865
Mein Auto: '97 540i 6 speed
You may have disturbed the left front knock sensor. They are kind of touchy, esp if you unbolted them and placed them back in the wrong position.

You DID replace the intake manifold gaskets, right?
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #3  
Old 12-03-2012, 06:49 PM
Talh3 Talh3 is offline
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Location: Atlanta ga
 
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Mein Auto: 1997 540i
I'm almost positive we did, I'll have to check with my roommate he did most of the work. Will it hurt to drive like this?
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  #4  
Old 12-03-2012, 08:16 PM
Talh3 Talh3 is offline
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Location: Atlanta ga
 
Join Date: Nov 2012
Posts: 14
Mein Auto: 1997 540i
Yes we did replace the manifold gaskets. We didn't unbolt the knock sensors and pluged them back in . What do you recommend? Also thank you for the reply, I really appreciate your help!!!! Will it hurt to drive? Ta
Hanks Tal.
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