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

[87chevy.com]

An o2 sim on the pre cat would be pointless.. the point of the pre cat se does is to measure the oxygen in the exhuast.. the computer calculates and makes changes. A sim
. Well.. it wont.. A performance tune sounds like an SD tune? I would ask DT if that's what they meant.

[BR3W CITY]

All they mean is that a tuner will disable reporting for those codes. I.E the problem won't change, you just won't see it anymore.

[Hart_Rod]

Interesting. I've run several sets of these headers and never had an issue with 02 sensor codes. Were the rear O2's turn off in your tune?