I really hope I don't have to live with engine fault lights?I got a turbo back exhaust installed then got a yellow engine light a few days later.
I then put a tune on it and it went away for like two weeks before reappearing so reloaded tune again before going away again.now i only retune it wen i want to get a pink slip...lol
Yellow engine light is a emissions fault from exhaust if u check with ur hand book....
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You will with a downpipe unless you get a defowler or tune it out. I am guessing you are on stock tune. To put it in simpler terms; Your ECU is programmed with the stock cat and measures the air quality coming out the back end of it via the o2 sensor. If there are too many nastys coming through it will think your cat has malfunctioned and throw a code. Because you installed a high flow cat, there are more nastys getting registered by your o2 sensor.I really hope I don't have to live with engine fault lights?