Ive had my GTM test pipes for nearly 6 months now, and never had a light. Upon start up the other day my SES light comes on. I drove, turned the car off and stopped for a while, and then it went off. Well then the next time it came back on. Car drives perfectly fine and havent had any other issues that would trigger a light...so why would the SES light come on after so long with the pipes? Could the resonators be broken in and they are flowing more air? Or could there be some carbon residue on the sensors themselves making them think there isn't enough air flow?? I may try some steel wool, but an idea of why the light would come on after 6 months would be better haha.

 

I had a light after almost a year with Berk HFC. Sometimes it happens. The steel wool worked perfectly, no more light since. I got that information directly form Berk, they even sent me the steel wool for free.

 

what do you do with the steel wool?

 

I have had Stillen HFC'S on my car for about 2 years. I have never gotten a SES light from them until about 2 months ago.. Now the light comes on all the time.. Don't know why

 

You slowly chew it and swallow the juice.











Seriously, you stuff a small wad of it tightly inside of the extender leading to the oxygen sensor right at the tip of the O2 sensor. Don't ask me for a detailed explanation of exactly how the steel changes the chemical composition of the exhaust and makes the light go off, I'm not the best guy to do that. It does work though, I can attest to that personally.

 

LOL ^

 

after months of having my HFCs on i get the SES light but its cus a bolt came loose on the HFCs...noticed how my car sounded....i re-tightened the bolt and SES goes away automatically