Rollback

[Bomble]

 Hi new to the forum and just bought myself a Yeti. It is a 2014 170 dsg which has had the emissions fix applied. I have contacted a tuner who tells me he can’t find a file to roll my car back to. I am wanting to do this before I have the car remapped. 
 My engine is CFJA, my ecu and file is 03L906018SE/9977.

 Can anyone help with a file?

[langers2k]

Doesn't look like Skoda ever released a pre-fix update for your ECU given these are all 9970+: https://vag-flashinfo.de/index.php?partno=03L906018SE

 

I think the unfixed version is probably 6356 based on this post: https://forums.ross-tech.com/index.php?threads/14155/

 

 

The most obvious options are to try and find an identical unfixed car as they might be able to copy the pre-fix software off or try and buy an unfixed ECU :/

 

[Bomble]

 Thanks for the reply. Yes I joined a Facebook thing about the rollback and that’s what they said too, I would imagine it wouldn’t be easy finding either of the 2.

 I did some searching and found this.

https://www.v-tuning.pl/sklep/produkt/plik-oryginalny-skoda-yeti-ecu-bosch-edc17c46-03l906018se-n-a-n-a-wsad-mapa,155158

 My local tuner reckoned it is probably the right file but he wouldn’t be happy installing an unknown file.

[Urrell]

There are mapping places that do have access to the cars original map to reinstall.

 

[Bomble]

7 minutes ago, Urrell said:

There are mapping places that do have access to the cars original map to reinstall.

 

 How would I find such a place? I’ve rung 3 local ones and they couldn’t help, one actually told me mine hadn’t had the fix though with the 9977 file but offered me a remap😀

[Urrell]

Google "Skoda emissions fix rollback"

Edit: unit18.co.uk do it quite cheaply in Milton Keynes.

Edited 21 January, 2021 by Urrell

[langers2k]

For the sake of £20-25, I'd be tempted to buy the file and ask your tuner to take a look to see if it's plausible...

 

Assuming it is, a quick rolling road session should highlight any obvious issues.

[Bomble]

Yes that’s the way I’m leaning, he is just worried it may brick my ecu or something.

[Bomble]

11 minutes ago, Urrell said:

Google "Skoda emissions fix rollback"

Edit: unit18.co.uk do it quite cheaply in Milton Keynes.

  There is loads round my area that advertise doing it but there is a problem with mine as they can’t find a file to roll it back to.

 Thanks for the suggestion though.