Hi guys,

the story in short. Due to a turbo (k03) defect I reduilt my BWA engine straight to an CDLB (TTS) engine and my Idea was, just to buy a TTS ECU from ebay to get may baby running again.....

Back from my garage and for anybody who thinks about doing the same - I must tell you - I dind't go :-(


Immo off - perfect, no problem. Changed the BWA ECU to my spare ECU out of an TTS (CDLB). Starting the engine - some minor pops, but in principle running smooth ..... but the dashboard light up like a christmas tree.


Got 3 serious errors:


012313 - Ventil für Abgasklappe 1 (N321) - P3019 - 004 - Unterbrechung -> this one I think is not a big deal, just because my "Normal" TT do not have a flap exhaust system, so the controller is missing.


005000 - Steuergerät defekt - E-Gas Überwachung  - P1388 - 004 -> This is one of the bad ones - the TTS ECU do not recognise my e gas pedal. So engine runs in saftey mode.


000256 - Luftmassenmesser (G70)  - P0100 - 002 - Versorgungsspannung -> and there's also a problem with the supply of my mass air sensor


According to the errors above also my ESP and brake controller reported some very strange errors :-)


Yeah at the end - switching back to my old BWA ECU, deleting all the errors and now everything is fine again. It's a pity but these two software versions seem to be too differnt to just swap.


CU guys and thx for all the help - have to think abaout, what I'm doing now....

TTS use another air mass sensor. You can change maps for your scrap enginecover-airbox or use TTS airbox and sensor, this is a very common retrofit. You need to change pinout from plug at sensor, pinout from ecu is the same. But sensor frequency it totally different.

I think there is some electric problem in ecu from 5V output, because gas pedal and air mass sensor should work.

Dear cherry,  thank you for the tip with the 5V supply - I'll go an check this later on! IT's an ECU from ebay, so it's not impossible to have a fault one.

You are right cherry - I'll go for a equal hardware than mine on ebay.

Meanwhile my car is running with the original software on the modified engine :-) ECU adapted to the larger injectors very well - never thought that the adaption range is that large.  Only somtimes there shows up an error "boost limit exceeded", especially when i accelerate for 3000rpm on :-)

I know - not a long term solution.