So a few weeks ago I bought a Skoda fabia vrs and I’ve had nothing but bother with it, I had the engine management light come on as well as the traction light so I went to my loca garage to see if they could diagnose the problems he told me it was to do with the Injector wiring loom so I got that replaced and it never fixed it since then I’ve had it all apart staying on the electrical contacts with electrical contact cleaner and I took it out to see if it fixed there is now no engine management light on but there is a traction light about 10 mins into a journey if I turn it off and turn it back on about the light goes off and returns again about 10 minutes later , when the light it on I loose power in the Revs it doesn’t rev up as quick as it should and it slow at about 2k -3k revs and once it passes that it pulls fine again and I’m stumped on what else to try on it has anyone got any ideas on why this light keeps returning and why it makes it rev up slower when it comes on 

Did the garage do a VCDS scan? Maybe find someone local to you.