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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 10-10-2009, 03:07 AM
Coralseeker Coralseeker is offline
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Location: Ireland
 
Join Date: Oct 2009
Posts: 1
Mein Auto: BMW 316i
P1159 error

Hi Folks,

I have a 316i. In the past year I have replaced the cat plus oxygen sensor aswell as all coils so it's been a blast ;-/
The current problem i have is the engine is revving to 1800 rpm while standing at idle and dropping back down again and then revving back up again a few secs later. I got a mechanic to plug in his diagnostic kit and this is the fault that shows up (P1159).
Has anyone come across this problem and know what the fix might be?
Thanks!
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  #2  
Old 10-10-2009, 01:54 PM
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Solidjake Solidjake is offline
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Location: NYC
 
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Mein Auto: 2002 330i
Probably your MAF sensor.

http://www.bimmerfest.com/forums/sho...d.php?t=229577
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  #3  
Old 11-30-2009, 09:25 AM
kal141 kal141 is offline
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Location: Leeds
 
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Mein Auto: BMW 316 E46
This fault code refers to Fuel Trim Additve Bank 1 High. This normally means your Lambda sensor (also known as oxygen sensor) is faulty.

On mine 04 316i E46 model. I have 4 sensors, this fault refers to the sensor at the front of the manifold. Bank 1 = Cylinder 1.

As youve said you have had these replaced recently, it may be a good idea to check if you have warranty on this as it seems to be faulty.

hope this helps.
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  #4  
Old 11-13-2010, 05:13 AM
jay786 jay786 is offline
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Location: London
 
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Mein Auto: BMW 318i SE
Exclamation

im having this problem but on bank 1 and bank 2.

Does that mean i need to replace 2 Lambda Sensors?

I was told its air leak and apparently its hard to find .. could be the oil vent hoses

PLease help
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  #5  
Old 11-13-2010, 07:42 AM
shanneba shanneba is offline
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Location: Indiana
 
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Mein Auto: 2003 330Ci
Here is some information from BMW on the adaptation values.
This should help you determine if you are running lean (air/vacuum leak most likely, clogged fuel filter or failing fuel pump) or rich (air filter, fuel pressure too high).
A good independent shop or the dealer can read these values from your car. AutoEnginuity / carsoft can also read these from your computer.

You can test the fuel pressure / volume at the injector rail with the proper tools.

Adaptation Values
In order to maintain an "ideal" air/fuel ratio, the engine control module is capable of
adapting to various environmental conditions encountered while the vehicle is in
operation (i.e. changes in altitude, humidity, ambient temperature, fuel quality, etc.).
The adaptation system can only make slight corrections and can not compensate for
large changes which may be encountered as a result of incorrect airflow or incorrect
fuel supply to the engine.
Within the areas of adjustable adaption, the engine control module modifies the
injection rate under two areas of engine operation:
1. During idle and low load mid range engine speeds (Additive Adaptation),
2. During operation under a normal to higher load when at higher engine speeds
(Multiplicative Adaptation).
These values are displayed in the "Diagnosis Requests" section of the DIS software and
is a helpful diagnostic toot that shows how the system is trying to compensate for a
less than ideal initial air/fuel ratio.
NOTE: If the adaptation value is greater than "0.0 ms" the Engine control module is trying
to en-richen the mixture. if the adaptation value is less then "0.0 ms the .Engine Control
Module is trying to lean-out the mixture.
Diagnosis Request Status Explanation
Additive mixture If the value is greater than 0.2 ms there is an unmetered air leak
adaptation (idle) or not enough fuel being supplied to the system.
The O sensor indicates a LEAN condition
The engine control module tries to RICHEN the mixture.
If the value is less than -0.2 ms there is an air restriction or too
much fuel is being supplied to the system.
The 02 sensor indicates a RICH condition
The engine control module tries to LEAN out.the mixture.
Multiplicative mixture If the value is greater than 8 % there is an unmetered air leak or
km (Part Load) not enough fuel being supplied to the system.
The 02 Sensor indicates a LEAN condition
The engine control module tries to RICHEN the mixture.
If the value is less than -8 % there is an air restriction or too
much fuel being supplied to the system.
The 02 sensor indicates a RICH condition
The engine control module tries to LEAN out the mixture.
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Last edited by shanneba; 11-13-2010 at 02:14 PM.
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  #6  
Old 11-14-2010, 07:29 PM
jay786 jay786 is offline
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Mein Auto: BMW 318i SE
okay so what does that mean ... information too explicit for me lool ... do i need to change the fuel filter?
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  #7  
Old 11-14-2010, 09:37 PM
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16valex 16valex is offline
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Mein Auto: 530I/5SC 97-528/5
Quote:
Originally Posted by jay786 View Post
okay so what does that mean ... information too explicit for me lool ... do i need to change the fuel filter?
More likely it's your lambda sensors, if one goes the other will probably soon follow. Replace them both.
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