Quote:
Originally Posted by mapleridge
Guys at the n54 forum say to use dp fix only get past emissions and to remove it after as it messes with the lambda adaptations. If you have no emissions testing then I would just get the AA tune that turns the light off.
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Yes, the secondary o2 sensors also monitor AFR, the potentiometer (dial) on the dp fix helps adjust the sensor readings and in turn helps the ECU adjust the mixture when its too rich or lean. Its no big deal but ideally the tune is better. I got it used from another member so I'll stick to it until I get the AA tune.