Quote:
Originally Posted by Anthony1s
Sorry to hear you're having this problem. I was just reading somewhere yesterday Mike from x-ph saying that Wagner issue was solved when they switched to Euro-6 approved cells. Such a shame it's still an issue.
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Well remember Euro-X just designates the emissions control of the catalyst core. It doesn't necessarily guarantee no CEL.
The O2 sensors are expecting to see a certain airflow characteristic delta between the forward and rear sensor. These high flow cats do exactly what they are supposed to do, flow faster and keep clean, but the o2 sensor still thinks something is 'wrong' because it sees more flow.
If I remember correctly, i think one reason the fabspeed ones have been so successful is because they space out the downstream o2 sensor a bit further than OE.