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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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Old 04-28-2017, 05:10 PM
335d fan 335d fan is offline
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Location: Canada
Join Date: Apr 2017
Posts: 2
Mein Auto: 2011 335d
335 Computer needs resoldering

I hope this is the correct forum..

First off, I love our 2011 335d. Over the past few weeks however we have been experiencing grave issues.

Engine light came on and after scanning showed the def tank had issues. It was removed and rebuilt. I was told it was the thermostat controller but that single part was not available.

After repair and driving 15 miles the engine light came back in and after scanning it showed error P244B which pointed to the diesel particulate filter...

The car was towed back to the garage that does all the work on the car and was told the computer incorrectly gave the latest error code and that portion of the computer failed and the components need re soldering.

This seems a bit far fetched a reply to the problems encountered... Can anyone shed some light on this?
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Old 04-28-2017, 05:21 PM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is online now
Nuclear engineer
Location: Washington Island, Wisconsin, thru Death's Door
Join Date: Apr 2015
Posts: 4,426
Mein Auto: 2012 Feb 11 X5 35d (E70)
Diagnostic Trouble Codes error codes do not specify a failed component, but specify a symptom that may be caused by many failures to be differentiated by a Test Plan differential diagnosis. Resoldering the computer chip is far fetched.

As a technician I was once certified to do that level of repair, custom flat-pack soldering, but I had a priceless work station.
I am responsible for what I write, not for your understanding of it.
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Old 05-02-2017, 09:11 AM
JTC1 JTC1 is offline
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Location: Atl
Join Date: Oct 2016
Posts: 17
Mein Auto: 335d
That's a new one for me. I've never heard of the ECU needing re-soldering. Might be better suited to post this on e90post.com in the M57 forum or the 335d Facebook page.

Last edited by JTC1; 05-02-2017 at 09:13 AM.
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Old 05-02-2017, 03:43 PM
imtjm imtjm is offline
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Location: VA
Join Date: Oct 2004
Posts: 1,287
Mein Auto: 335d, 328ix, hard bargain
how do they know that the computer needs to be resoldered?
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Old 05-11-2017, 04:22 AM
robnitro robnitro is offline
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Location: NYC area
Join Date: Aug 2016
Posts: 34
Mein Auto: x5 35d e70 2011
Check your ecu connectors. Remove and put them back one by one. Or if you got water in the area of the ecu box, open up the ecu and do contact cleaner and let it dry in a warm place fire a few hours. It happened to my tdi once due to condensation.
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