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BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

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  #1  
Old 06-29-2015, 06:31 AM
makofkc makofkc is offline
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Location: kansas city
 
Join Date: May 2013
Posts: 3
Mein Auto: 2010 BMW 335d Sport
SES Light, code p0638

I have a 2010 335d with 63k miles. On a trip this past weekend, code p0638 came up. I haven't had a carbon cleaning yet and was hoping that this light indicated it was time. Looking up the code, it is related to the Throttle Actuator Control Range/Performance (Bank 1). The car didn't go into limp mode that I'm aware of, however it does sound a little rougher (I maybe psyching myself out though).

Has anyone gotten this error before? And if so, could it be related to CBU? I have an extended warranty that covers CBU and have an appointment to get it looked at in 2 weeks at BMW. I'm hoping I can get my CBU cleaning out of this.

A side note:
Are you guys (that still go to the dealership for warranty work) able to get into service within 1 week? This is the second time I've taking my car to the dealer and it was 3 weeks for my appointment the last time. BTW, I'm in Kansas City.

Thanks!
Alan
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  #2  
Old 06-29-2015, 09:24 AM
Nadir Point Nadir Point is offline
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Location: Colorado
 
Join Date: Dec 2013
Posts: 188
Mein Auto: 335D
Lead time with the dealer I've settled on pretty much depends on whether or not you want a loaner. I've been able able to get in within a few days, but wait times for loaners are usually booked out 2-3 weeks.

It's a generic code that could mean anything related to pedal position sensor malfunction, throttle position sensor malfunction, throttle actuator motor malfunction, dirty throttle body wiring harness, loose or dirty connections, and/or DDE malfunction of some sort.
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  #3  
Old 06-29-2015, 10:07 AM
montr montr is offline
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Location: Atlanta
 
Join Date: Oct 2006
Posts: 258
Mein Auto: 335d 2010
Had this problem before. The dealer replaced the Throttle Actuator 11-71-7-804-384
I think this is a common problem.
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  #4  
Old 06-29-2015, 10:56 AM
makofkc makofkc is offline
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Location: kansas city
 
Join Date: May 2013
Posts: 3
Mein Auto: 2010 BMW 335d Sport
Thanks guys. I think I'll try to reschedule without a loaner to see if they can't look at it this week. We're taking a long trip next weekend and want to make sure my car won't get worst if I keep driving with the part broke. Our other car gets about half the fuel economy, so it is preferable to take the d.
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