Originally Posted by signes
A leak would generate a CEL, but you should get it fixed regardless. Where is it? You have both the primary and secondary stock cats still on? You could also have a faulty O2 sensor among about 1000 other reasons.
i have the primary cats still on, i had it like this for the last 10,000 miles at least and it never gave a problem i turned the code off and it just came back on its the codes 2298, and 0492