430 Fabspeed Headers, Tubi Exhaust, Fabspeed O2 Spacers - getting CEL

Have the catalytic convertors been removed?

 

Oh boy, I'm still dealing with the O2 sensor stuff (I only have Fabspeed headers), but I don't think I ever got those codes. I think the only true failproof way to keep the CEL off is ECU tune, but that won't allow you to pass smog inspections. The extenders sort of worked for me, but they kept getting loose so I had a shop take them off. Only to find out, that I think there are 4 extenders, and only two were removed?

I should have done my homework, because now I have to figure out how this whole thing was set up.I actually need to get with the Fabspeed rep because I've got some question about this stuff, but keep getting sidetracked.

 

Basically the ECM is trying to communicate with the aft O2 sensors (downstream of the catalytic convertors) and having no joy. I am a bit concerned as to why your car has O2 extenders on it in the first place. Fabspeed headers and a Tubi exhaust should not be throwing those codes or requiring O2 extenders if the OEM catalytic convertors are in place and working. There has to be more to the story.

 

https://repairpal.com/obd-ii-code-p0134
Found this online.

Might be time to replace the O2 sensors? I purchased some the other day, they weren't to expensive. I plan to get them installed next time I take the car to the shop, or may do it myself if I find a better place to work on my car. If your the DIY type, install isn't too hard. For me it's a time/workspace issue.

 

I would reset the codes and see if you get another 6 month run cycle before codes are thrown. I believe many f car owners w after market headers cats that run the bandaids ext o2 sensors just deal w this reset code cycle….

the other option is to tune it out. I’ve read the sensitivity of the secondary o2 sensor code range is widened to deal w catless.

 

I would just drive it. Probably just go away.

 

You can try a set of big daddies. They work really good on my car. The ones you have look really long so the o2's may not be getting anything to them.
http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html

 

I bought some stainless mini cats on EBay. I think they cost about $30. You have to make sure that there is a small grey cylindrical honeycomb unit inside the extenders.

I have exactly the same setup you have on my 07 430. Aftermarket headers that have no pre-cats, header blankets, original main cats and Ferrari sport exhaust. I have not had a CEL since I installed the mini cat extenders two years ago. I used straight ones and everything fits fine.

When I replaced the OEM headers with aftermarket headers that have no pre-cats, I got CE light and cat codes. I tried simple rear O2 sensor extenders. This worked for a while but then failed after about 1/2 hour of driving. When I installed the extenders with mini cats, the problem went away permanently.

Make sure that the cables are not twisted and that they are routed smartly away from hot items. Twisted cable could cause them to work loose. Mine have stayed tight. I used the workshop manual torque to tighten the O2 sensors and mini cats.

You need to look at the O2 signals. I use a Foxwell 530 scanner that I bought directly from Foxwell with the Ferrari software installed for about $150. You need to watch the signals from the rear O2 sensors to see that they are changing when the engine is started etc... Otherwise, you need to check connections etc... You might also have a clog in the extenders.

 

As said earlier, more to this story. When I installed headers without pre cats I got the CEL. The codes were for cat inefficiency. 0420/0430. (from memory) What you have is something different. No activity suggests the sensors are not seeing your cats at all. Are they plugged in? The connectors are a little tricky. Or they may have been installed without unplugging them, twisting the wires up = bad. Just some thoughts.

 

This is not the case with the later cars 2007 and up. They have more sensitive software.

 

Big Daddy O2 sensors. Solved my problem with Fabspeed headers.

Ray