How to get rid of Check Engine Light for Cats on 360?

What is the actual code? Is it delayed response or inefficiency?

 

get a code scanner - OBD II.... can get them cheap <$30 and they read to your Iphone.
You might need some of those little cat convertor pipes and screw the 1st set of O2 sensors to these.
I have a spare set I'm not using now. I bought them when I was going to install a/m headers, but changed my mind.
There are not expensive. They are called big daddies.....

http://www.bigdaddiesgarage.com/straight-cel-fix.html

the challenge with am headers (w/ no cats) on our cars is that from my research it appears each car behaves a little different...... some get away with am headers and no CEL.... some then add the bigdaddies simulators.... and no CEL.... and some have no answer to the CEL..... which will utlimately require you:
1) get a custom tune..... or 2) drive around with the CEL.... or 3) reinstall stock cat/mani's...... OR some people resort to pulling the bulb for the CEL.... which is dumb.

 

Hey one4torque,

the big daddies website shows this fixes P0420/P0430 codes. These don't exist on the list of codes I have for 360's. Maybe they relate to the P0422/P0432 codes? (Main Catalyst Efficiency/Main Catalyst Efficiency (Bank 2) codes???

I'm getting P1126 (Long term Fuel Trim Additive Air (Bank 2) codes on mine which my mechanic says is due to the Tubi exhaust I have. Do you know if this is also a post-cat O2 sensor issue? I'd love to get rid of my CEL that comes up after about 150Km's.....

 

That sounds like a long term fuel trim out of range issue.
If your mods changed the afr and in turn require a fuel trim which is outside of the range of the stock tune, then you can get a CEL.

In my mercedes days... we would reset our adaptations, and drive around under different conditions for the maps to be set with new adaptations.
Sometimes this would adjust for new parts if they are not too radical, and if the tune will allow for this variance.

See below link to a ref for this CEL.

I would reset the CEL, and drive around for a few days and see if/when it comes back.

If it comes back, I would check a few things:
1. Any ex leaks after install?
other items will require special tools.....
2. check fuel pressure, etc..... per chart.

On the mercs a bad mass air meter would throw all sorts of other codes..... but I'm not going to spec on your dime with this platform.




https://www.ferrarichat.com/forum/attachments/screen-shot-2014-11-03-at-2-22-41-pm-jpg.1976312/

 

There are literally100 threads on this. Most never get adequate resolution of the issue. At least not one that passes smog. He big daddy solution didn’t work that often, caused some cracking, and won’t pass smog in CA.


Sent from my iPad using FerrariChat.com mobile app

 

Skid - is this the dirty little secret aftermarket header co's don't tell you when ordering these products? Sounds pretty hit and miss on success.

 

** could the rear O2 sensors just be loose? or bad?

 

Done the reset and drive it, and CEL back on with same code. It's going in for a major in a couple of weeks so will get all those other things checked while it's there. Really don't want to have to do a custom tune. The Tubi has been on for some time (before I bought it) and the previous owner told me abut it, but said it happened if you started it and let it warm up in an enclosed space (garage).

 

I would not panic...... stock ex manifolds and cats can be found used...... if needed.
I presume the low prod vol is why we have so little tuning support for this platform......
just about every LSX car around here is running dirty.... long tubes, no cats, and am exhaust... and NO CEL..... all tuned out by your local speed shop

I'm sitting on a CS muffler...... hopefully I can install that this fall with no CEL......

 

Not a secret but yes. Aftermarket headers are for off-road use and won’t pass smog. They will tell you off road use but leave the details out. Can you tune it out, yes but the car won’t ever be smog legal so that makes it hard to sell. FYI: hanging the muffler has nothing to do with smog systems so can not fix a cel.


Sent from my iPad using FerrariChat.com mobile app

 

My aftermarket headers DO pass smog in CA
Just install mini cats 02 extenders (fabspeed or big daddies) that will get rid of the 421/431 CEL in most cases.

This is the thread that has most information about it
https://www.ferrarichat.com/forum/threads/p0421-p0431-trouble-codes-catalytic-converter-anyone-have-good-fix.552866/


Sent from my iPhone using Tapatalk

 

In my understanding it’s more the difference across the cat, so you may have actually made it more likely to CEL by doing the 300 cell cat.

I’ve heard that catless headers + sport cats sometimes works on it’s own, but other people have to relocate the sensors as well. Of course just buying new catful header timebombs is the only 100% CA smog legal solution.

 

Guys,

I'm currently away in Italy so experimentation/further development has stalled a bit for a few weeks but I'm VERY close to being able to resolve the issues of cat related efficiency on the 360.

I've already been able to identify the settings required to do a complete catalyzer CEL delete (which entirely disables cat monitoring) but I'm also looking at a way to keep catalyzer monitoring emissions friendly and still not throw a CEL. I've also been able to identify the settings for cat temp monitoring so you can turn them off too entirely and remove the cat sensor/conversion block probes and simply plug in a bung. No more slow down lights ever...

These will be part of my Ferrari 360 'Swiss Army Knife' software coming soon with which you can also enable/disable immobilizer, swap MAF's to larger ones, swap to CS or custom maps, adjust throttle pedal sensitivity, etc. This isn't a re-tune, you can retain your existing fuel maps (or swap to CS factory maps which are very safe too) its reflash of the ignition ecu's so watch this space.

-T

 

360- I so want this!!! Please hasten back from Italy and finish this most important work sir- your people need you.

 

Oh goodie, another cat CEL thread.

My story is pretty ironic. No CEL when I bought the car, and it had the original headers and cats running into a Tubi. Problem was, the pre-cats in the headers were toast - did I mention no CEL? - so I replaced the headers and cats with stock units that had low miles and were perfectly fine, and I replaced the Tubi with an OEM valved CS exhaust. That's when I got the CEL that wouldn't clear. Turned out PART of the problem was a loose pin in a connector. So no CEL for a few hundred miles, then it came back. I'm not scheduled to take it to the shop until November, so I'm just ignoring it for now.

There is no, "this will always work" solution.

 

Your car has six o2 sensors? I am having a similar problem in a 430 and picked up a set of big daddy's. They go on the rear o2's to try and remove them from the stream a bit. You only need two.

 

Ok so CA requires all monitors set AND that you pass a visual inspection to have OEM equipment. How did you pass the visual? Note: I paid a shady garage isn’t a valid approach.


Sent from my iPad using FerrariChat.com mobile app