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BMW 5-Series (G30) Forum Engine, Exhaust, Drivetrain, Tuning Modifications How to reset your ECU?

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      06-23-2019, 05:04 PM   #1
AddyDaddy
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How to reset your ECU?

Is it possible for you to reset ECU back to stock after coding?
Or do you need to visit dealership?

Thanks all
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      06-23-2019, 11:10 PM   #2
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Don't know how you have changed it but taking to the dealer for this I think will undoubtedly red flag it and cause bmw to invalidate the warranty for at least the engine and transmission.
They may notice anyway when you take it in for a service or other work.

Can you simply undo what you did ( which was what exactly?)
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      06-24-2019, 06:11 AM   #3
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Quote:
Originally Posted by AP View Post
Don't know how you have changed it but taking to the dealer for this I think will undoubtedly red flag it and cause bmw to invalidate the warranty for at least the engine and transmission.
They may notice anyway when you take it in for a service or other work.

Can you simply undo what you did ( which was what exactly?)
Just Dinan installed at authorized installer.

I coded car to default to sport individual on start up
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      06-24-2019, 06:55 AM   #4
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Not sure I quite follow. Which exit are you referencing.
Or do you mean reverse the coding you did?(if so which tool did you use for that?)
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      06-24-2019, 07:38 AM   #5
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Quote:
Originally Posted by AP View Post
Not sure I quite follow. Which exit are you referencing.
Or do you mean reverse the coding you did?(if so which tool did you use for that?)
Bimmercode
I think by setting sports as default on start up I killed the sport plus.
Meaning I lose pedal feel when going from sport to sport plus
Same happens with sport individual if I set engine to plus. If I set engine to sport plus it loses power like going to a lesser mode, if in individual I set engine to just sport and all else to plus it's fine.

Watch video
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      06-24-2019, 09:37 AM   #6
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Can't you just change it back to what it was or use the previous backup version BC saves?
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      06-24-2019, 09:40 AM   #7
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Originally Posted by ksoze View Post
Can't you just change it back to what it was or use the previous backup version BC saves?
I did that.
Sport still has the bump in power like in video?

If I do sport individual and set engine to sport plus it does the same.
Like when driving I can toggle the individual settings for engine from sport plus or sport or comfort for engine.
Sport plus engine is same as comfort, but when you click regular sport in setting it peps up?
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      06-24-2019, 10:56 AM   #8
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I don't know in that case. Not familiar with that product , hopefully someone will come along who may know the answer.
May possibly require esys to resolve


[I guess the pitfalls of coding.]
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      06-24-2019, 11:13 AM   #9
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Does it feel as if there is a 1-2 sec delay when stepping on the accelerator? Almost as if the trans is slipping?
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      06-24-2019, 11:16 AM   #10
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Originally Posted by Bimmertrashjr View Post
Does it feel as if there is a 1-2 sec delay when stepping on the accelerator? Almost as if the trans is slipping?
No,
Just when going from sport to sport plus it feels the same as when you go from comfort to eco, a loss of some pedal. Check the video it's simple, just don't know if it's correct
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