I think everyone understands that if any product is installed incorrectly that it will throw codes. The question is will product X throw codes when its installed correctly and exposed to various conditions such as non-name brand gas, different weather, etc.
Of around 200 JB2 users I have not heard of a single code coming up once the product was installed properly. Including guys who run Costco/ARCO gas.
I believe the R is much more susceptible to codes due to the higher boost levels, but so far no WOT codes reported. A couple guys with newer ECU flahses have gotten a 30 second code when leaving the R on overnight.
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