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  #1  
Old 07-02-2019, 11:22 AM
germans germans is offline
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Idrive software update fixed error codes?

My GF just got a 2012 BMW 335I with 45000 miles on it.

I got out my code reader and started checking for codes and saw some of the following:

801206 Blower output stage: Undervoltage or overvoltage detected
801A55 DWA: The alarm has been activated
CD0487 ZGM: Sycronisation process for FlexRay failed

She hasn't added anything aftermarket to the car like stereos or anything and all I did was clear the codes and update the BMW iDrive software to the latest. Now I get no error codes. Is it possible that the BMW iDrive software fixed the issues? I thought the update was only for the interface software for the screen.
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  #2  
Old 07-02-2019, 12:41 PM
dzlbimmer dzlbimmer is offline
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Quote:
Originally Posted by germans View Post
My GF just got a 2012 BMW 335I with 45000 miles on it.

I got out my code reader and started checking for codes and saw some of the following:

801206 Blower output stage: Undervoltage or overvoltage detected
801A55 DWA: The alarm has been activated
CD0487 ZGM: Sycronisation process for FlexRay failed

She hasn't added anything aftermarket to the car like stereos or anything and all I did was clear the codes and update the BMW iDrive software to the latest. Now I get no error codes. Is it possible that the BMW iDrive software fixed the issues? I thought the update was only for the interface software for the screen.
Software did not fix any of that. They are just Intermittent failures.
Just keep scanning it every couple weeks and see what comes back and at what frequency.
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  #3  
Old 07-02-2019, 09:52 PM
CoolShirtDude CoolShirtDude is online now
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Mein Auto: 2011 BMW X3 2.8i F25 N52
How old is the battery? Since you have a 2012, that would be one of the first things I would check.

Also ground cables, are another area the is troublesome on BMWs, these cars tend to have random codes when voltage is out of spec.

You can use realoem.com and newtis.info to locate the grounds as well as part numbers.



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Old 07-03-2019, 08:40 AM
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Zeichen311 Zeichen311 is offline
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Quote:
Originally Posted by germans View Post
... all I did was clear the codes and update the BMW iDrive software to the latest. Now I get no error codes.
Sooo...you cleared the fault memory and now you are puzzled as to why there are no faults?

(Sorry, I could not resist.)

As already stated, it just means they were intermittent or non-recurring events. The fault memory includes the latest mileage at which each fault code was logged. When reviewing the memory, if the current mileage (actually it's logged in kilometers) does not approximately equal the current odometer reading, you're unlikely to see the fault again immediately after clearing the memory. Keep an eye out for future occurrences and act accordingly.

Side question: When you say you "updated iDrive software" do you mean the in-system update via the USB port that you initiate from the iDrive menus? Or did you actually upgrade the integration level (i.e., load new firmware) using ISTA/P?

The former is only a driver update for the Bluetooth interface stack. It changes neither the user interface nor fault memory.
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Last edited by Zeichen311; 07-03-2019 at 01:14 PM.
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