Catalyst Error codes 1445, 1446 & 1448 and unknown connector

Hello Everyone,
I recently got this baby to be confronted to error codes including 1445, 1446 and 1448.

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I've performed a full service including timing belts, filters and spark plugs.

I fetched the codes with a simple ODB2 327 interface, following a "Slow Down" then "Engine check" warnings :
After a little while, the "Slow down" disapears and the "Engine check" appears, but the car keeps going as normal.
Water and oil temp are "normal", pressure as well. No strange noises, no weird fumes or smells.
Everything looks fine.

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All codes are related to the catalyst, but obviously the real problem migth be elsewhere.

Anyway, on these pictures you'll see a connector attached to nothing, and I can't find a relevant sensor or part it would might be connected to.

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It's wiring joins the main harness under the left throttle, it's the smallest loom in the area.
Maybe it causes the error codes.

What you guys think ?

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Thanks for your answer.
Bearings came from superformance.co.uk
It's likely their last kind of supply.

I went for another ride with an enhanced OBD2 app and read O2 Sensors after erasing error codes.
It looks like the S83 & S84 read quite different while S81 & S82 are similar.
On top of that, the S84 has 0 as Min value, and I don't like that.

I did a dozen of readings and they all looked very similar with minor variations (1 to 5 on pictured values).

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I can't find if the S81 & S82 are left and right before cat, or before and after for one bank.
Same for S83 & S84, So I don't know which sensor is the S84.
I guess I shall try another app or computer reading.

Anyway, while the engine was heating up, there were no codes at all, but eventually, a new code showed up :
1461 : Catalyst Bypass Flap Circuit

is that the silencer flap for low rpm ?
I can't see any cats bypass on part catalog or workshop manual. What are those ?

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Which part are you calling "cat ecu" ?

The #20 on that drawing ?
https://www.ferrariparts.co.uk/diagram/ferrari/360-f1-spider/019-exhaust-system

 

Good idea. I'll do that search, even though I did it once.
I'll also swap the ecus and see what happens, thats quick (I hope ! lol)

 

I don't know if you're an expert or not, but you certainly help, showing me some leads.
THANKS A LOT !
I'll keep this topic posted.

 

I looked everywhere I could, but couldn't find any part with 2 pin connector within the wire range, except maybe behind the steering reservoir (it's a spider) and oil filter, but without and endoscope I can't really see what's down there.
I'll double check during the oil change I have to perform very soon.

Anyway I swapped the cat ECUs but couldn't go for a test drive since a storm came rigth when I was about to leave the garage.

Stay Tuned.

 

Today's update :
I forgot to mention that after using the car on previous tests, and erasing the 1445 and 1446 error codes when they happened, I got a #0304 two times, it's : "misfire on cylinder #4".

So, on top of the Cat ECUs swap, yesterday I also swapped the #3 & #4 Coils, to confirm that the #4 might have some fails sometimes.

And this morning tests were totally blank from errors !!


It was quite chilly though, so the exhaust hadn't had time to heat up during my tests on the 5 miles road between home and grocery shop (the only road I am supposed to drive during these lockdown days).

I'll go driving through center town tomorrow and have it warm up a little more...
Stay tuned.

 

Some more questions though :
- the two wires to the unknown connector are (Green/Blue & Purple) But I can't identify the connector on the Workshop Manual wiring diagrams, as I suspect the color initials are in italian.
Anybody has the Wiring Color initials Table ?

- I couldn't find the info about which O2 sensors my ODB2 app is refering to (see pictures on 1st post)
Which of S-81 to S-84 are before cat or after cat, and left or right bank ?

 

To replace the spark plugs, you need to unfit the coils, as they are on top of spark plugs.
Access of sparks is a pain, because you shall need long and thin arms and hands, and gymastic to get there without damaging the body work, especially plugs for #1 and #5, but it's doable.
You shall need a good plug 16mm tool.

Coils are each fixed with two 6mm thread / 10mm hex head bolts, and they come off easy when the bolts are off.
They each have a connector to the wiring, which is quite easy to unfit as well (when you get how to !).

So swapping two coils to check on misfire errors is quite easy.

For the cat ECU, it's quite easy as well, except that on Spiders they are hidden under the side aluminium panels that are a bit long to unfit and refit properly, without damaging anything.

In my case, I swaped left and right ECUs to see if the errors I had on right bank might swap to left bank as well, which would help to confirm a specific ECU is sometimes faulty.

 

Thanks for the suggestion, but it could not, because the exhaust valve connectors are at the very rear of the car, under rear lights, where the vacuum valve is.

 

I suggest you buy an universal ELM327 Wifi ODB2 interface (around 20$) and a smartphone app such as EODB.
You could then get proper error codes when "Slow Down" flashes; It helps a lot to understand where to find the erroro origin, even though we have the demonstration that some part failure could generate several different error codes, depending on situation.
The most positive aspect is that you can erase the codes and wait for them to get back or not, confirming the nature of the situation.

 

I wouldn't know if one was bad. I juste assumed the right one might be faulty, inducing some errors on cat analysis and swapped to see if the problems would change side or not.

I am now pretty sure that the faulty parts are the O2 sensors, because the readings doesn't make sens to me : I should have two similar values for Sensors before the catalyst and two other values for the sensors after the catalyst.

Problem is, I don't know which is which on the readings and I'm not ready to change the 4 of them, even if reason should lead me to.

 

My car is 73000km, so it makes sense that several parts shall need replacement, which I would usually do without thinking twice about it, but the sum of all these parts, including ECUs, is more than 2k, so if I could delay some of that, I'd be happy to !


I assume that is the part you were refering to ?
https://technistrada.com/355-360-456-550-575-f50-enzo/4-355-360-456-550-575-catalytic-temperature-control-station.html

Indeed cheaper than OEM, but it's in the US. (I'll need to add shipping and VAT)

 

Indeed, I had them quoted half price at a local auto parts dealer.

 

Ok, thank you very much.
It looks like a vacuum valve, but I don't have such a valve on my car.
Could you follow the vacuum lines now, to see which part they are involved with ?
One is likely coming from the intake, but thats the other one that is meaningfull.