Car shows "limp mode" or "reduced acceleration" warnings (possible ECU issue)

[JClem]

Yeah, I picture the UK as mild drizzle most of the time, but then a lot of the American South is "mostly sunny, with a chance of life-altering floods".

Certainly felt like that today in London.

 

[Stealthinnimbus]

So based on experience today with miltek valve in “mode 1” it definitely causes limp mode and MIL light. Happened repeatedly while pushing hard. Took it out at lunch time and been fine all afternoon. Will be writing to miltek and requesting a refund as its either faulty or doesnt work