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Again I have my Lane A coming on and flashing intermittently, again downloaded the data via BUDS with the dongle and AGAIN trying to figure out what the problem is. AGAIN, this data interpretation is one of the biggest support problems that needs to be solved by rotax. The five comprehensive manuals cover everything else in pretty good detail but FAIL with the data interpretation for simple maintenance. If anyone wants to research this rotax BUDS/dongle downloaded data support in greater detail see https://www.rotax-owner.com/en/912is-technical-questions/6775-buds-dongle-ecu-download-error-code-messages-reference

Any way attached are the data logs that I think point to a bad EGT probe. Yes I have checked the wiring and put conductive paste on the EGT connector and same problem. In flight I simply switch the Lane off and back on and it clears it.  In the data logs you can see that I have isolated the  actual Lane A flashing to a specific CYCLE (which must mean something) to the specific Warning and Fault.

To me it looks like an EGT probe but any expert advice would be helpful. I tend to get the Lane A flashing on a descent, maybe every 45 minutes or so. 

7821_1_iSLogFaultsMarked.jpg (You do not have access to download this file.)
7821_1_iS_Faults.jpg (You do not have access to download this file.)
  • Re: BUDS/Dongle continuing problem with understanding the data

    by » 5 months ago


    Just went through a faulty EGT as well.  In my case the Lane A would start flashing as soon as the fuel was pressured up and prior to engine start.  And the #3 EGT would go to overheat immediately.  I had been working on all EGT's due to a muffler issue.  One of them was screwed up in the process.  I ordered a new one and replaced it.  All good.  

    In your case it is intermittent and not immediate.  But still likely something shorting out in the #4 EGT probe.  Someone will likely suggest swapping with a good one and see if the fault follows the EGT.  But a replacement EGT is likely in your future.


    Thank you said by: RotaxOwner Admin, Paul Hamilton

  • Re: BUDS/Dongle continuing problem with understanding the data

    by » 5 months ago


    Thanks Paul D. My thoughts are with yours. I guess no additional expert advice on the above error codes? From what I see it is the #1 EGT probe since the EGT error is for Cylinder 1, not the #4 EGT I think.  I assume the 4 is for some kind of a code and it is # 1 cylinder EGT. Any conformation on this? Anybody even if you are not an expert? 


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