840Ci error code 39 - Servomotor choke valve - Bimmerfest - BMW Forums

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8 Series - E31 (1989 - 1999)

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Old 04-14-2009, 06:37 AM
840dave 840dave is offline
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Location: U.K
Join Date: Apr 2009
Posts: 1
Mein Auto: 840 Ci
840Ci error code 39 - Servomotor choke valve

Long time reader 1st time poster.
I've just purchased a 840ci the traction control light is permanently on. Iíve had the car code read and is coming back as error code 39, servomotor, choke valve any way of testing this part or repairing it. I've taken the unit off it seems to be working fine has any one else had this problem or any one point me in the right direction.
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Old 02-04-2010, 04:06 PM
ctovar ctovar is offline
Registered User
Location: Anaheim, CA
Join Date: Feb 2010
Posts: 1
Mein Auto: 96 740il
I have the some problem

Hi Dave,

My name is Cesar, I have a 96 740IL and I'm having the same problem with this car, code 39 with the traction control light on. Did you solved your problem already? Please advice
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Old 01-26-2013, 11:31 AM
luckyduckmaster luckyduckmaster is offline
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Location: mi
Join Date: Jan 2013
Posts: 1
Mein Auto: 528i
code 39

i have 528i with code 39 chock valve and asc light stays on? any help please
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Old 01-31-2014, 04:25 AM
mr.softshake mr.softshake is offline
Location: Norway
Join Date: Jan 2014
Posts: 2
Mein Auto: BMW E39 520I
I have 520I and got the ASC light on, same as you. I got it diagnosed and found out that i got the error code 38, 39 and 40. All of them was ABS faults, and it had something to do with the choke valve. On the intake to the engine i found the choke valve, theres a wire going between the Choke itself on the air intake to a servo-motor. It cuts the air intake into the motor when you start to spin, to get a better wheel controll and stop spinning. Im not sure of this, but it might fix the problem by changing it. Either the wire or the choke valve servo-motor itself.
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