DT Tri-Y and CEL

[Ole Greenie]

Hi Ya'll,

Its been a couple months since I last posted here, but I'm trying to fix a CEL issue for O2 sensors withthe DT Tri-Y ceramic coated headers. The codes are always "Slow response" for both sides. DT mentions:

"INSTALLATION NOTES
Installation of these headers will trigger a CEL (check engine light). This minor problem can be corrected with either a performance tune or tuner, and/or an o2 sensor simulator offered by many companies in the aftermarket."

I'm getting a tune this next week but wanted to know if this is the only fix for this issue. I have this issue on both an LM7 (2002) and a LQ4 (2006) with the same 3/4" diameter Tri-Y headers.

Thanks for any insight ya'll may have!

John