Ah. Well then yeah, it doesn't hurt to be proactive. Either method would work. Personally I think it'd be easier to just use a little steel wool to buffer that hole more. One of the nice things about the defouler method is that it actually mounts the sensor back away from the direct path of the exhaust gases, but given that these things already have the extended ports that do that for you by default, mounting defoulers on top of those would be redundant.

Well, I got the CEL again today and I checked the code, it came up with PA200 or P2A00 i forget now. I googled it and it seems to be one of the sensors, but from everything I found, it could be 50% O2 sensors or 50% MAF sensors bringing up a lean reading....

Now since the berks in the states haven't triggered any CELs, I thnk I'm the first in Australia to have them (on the forums) so I wonder if we have anything different in regards to what trigger points are used for the CEL... I know a few guys here have the FI cats but they haven't triggered a CEL for any of them either though.....

$10 ebay defoulers?

I would contact Tony@FI I think they hade a fix for this

Got an SES light yesterday, after about 2k miles, I think im going to try the steel wool method myself.

Got one today, driving from Atlanta to VIR. First time I've driven the car longer than an hour. It happened after five. Will reset it when I get home after tomorrows track day

Hey! I'm not alone anymore haha, Did you happen to check out the code? I wonder If you got the same one I did.

Have you got the Berk HFC's?

No, see my post in the beginning, berk test pipes

Hey so I spoke to my mechanic about this - The P2A00 code means a few things but one of them was the MAF getting a slow response or a lean condition. He thought maybe getting better intakes might get rid of the CEL (I still have the stock airboxes but headers back have been changed) Do you guys think changing the intake out will sort this issue out?

Have the guys who have copped the CEL with the Berk HFC's got the intakes done aswell? or stock intakes?

I have the G3 intakes, and I've never had a CEL (I have about 5000 miles on my setup). It seems strange that the stock airboxes would be throwing a code, unless (and this is complete speculation on my part) the better exhaust flow has created an 'imbalance' of some sort. Airflow is a two-part deal, right? Air goes in. Exhaust gases go out. These two need to be balanced, in a manner of speaking. For example, you could have the most freely-flowing air intake in the world. But if your exhaust flow is plugged up, the intake isn't going to help you. When you put your foot down on the accelerator, your car will feel 'corked'. In fact, many years ago on a different car I had to put my stock exhaust back on temporarily, and 'corked' is exactly how it felt, in spite of the fact that I had a nice intake setup on the front end. Now let's reverse things. You have a setup that increases the flow of exhaust gases exiting, but the intake of air on the front end hasn't been increased from stock. So maybe it's imbalanced in that your engine can't get enough air in to keep up with the rate of the exhaust gases exiting. Would that cause a lean condition? Not sure. Slow response? That sounds kinda in the ballpark of what I'm describing, doesn't it? The engine wants more air than it's getting. I don't know, does any of what I'm saying even make sense?

I have G3 Intake and Berk HFC with about 4500 miles and never have had CEL.

Yeah that's basically what he was saying and the more I thought about it last night the more it made sense. I'm leaning towards the stock intakes being restrictive and the exhaust side being almost free flowing causing the imbalance. Do you think that Nissan would be able to tell me what the best solution would be? I'm sick of seeing that damn light haha

Well, Nissan would most likely just blame the problem on your aftermarket parts and call it a day. And maybe make a notation in your file so that they can deny any warranty claims you might have in the future. I'd get the G3 intakes if I were you. You can also just have the code reset and see if it comes back. Just plug a code reader into it -- any reader can also reset.

Yeah I have reset it but it comes back after a few days :(

Having a note in my file doesn't sound to good to me, might have to try it out and not mention it to nissan...

Are the Berk HFCs the only exhaust mod you have? No CBE or headers yet?