SES after G3
 

Installed G3's on saturday and drove approximately 250miles without any problem and my engine pulls a P2a00. I know all of the vaccum lines have been properly attached to inake tubes. Anyone every come up with a solution to this code or have a smilar problem? I read the 15 threads that concerned this code and no answer was seen. Any helpful pointers would be greatly appreciated.

Hmmmmmm... This is a catalytic converter issue...


Try cleaning the MAFs anyways

Feel free to text me (310)eight nine three-4207

i've had the 0420 and 0430 ses. Didn't get this one til after cai. maf's are clean, never touched the metal or with dirty hands.

... The oil from the K&Ns might trigger it, but it's still mainly an O2 sensor



Do you have HFCs or TPs???

I have hfc's from ARK. They installed them the day after christmas :) and had the 0420 and 0430 codes pop up. I installed the brass bung extensions from z1 motorsports. None of the wires were pinched or twisted to the point of damaging them. The 420 and 430 codes cambe back and Then I installed the G3's. Im kinda lost as far as why this is popping up.

ok...UPDATE. I checked the maf sensors and there doesn't appear to be any oil on them. Does one know how to clean them or the procedure for doing so? Also checked the crankcase vent hoses and they are all properly seated and clamped. Throttle hoses are properly mounted as well. I had the HFC's on for close to 2k miles and only had the common codes with that. I installed the bung extensions this past weekend with the G3's and know that I did tigthen them down really well so to the point where it popped a little bit (thats how I knew they were tight) and installed the 02 sensors with them. Please help or give me some guidance on what it could also possibly be? I read that the G3's lean out fuel mix, is this the common code behind installing the G3's?

You have to buy MAF cleaner from a auto store. I don't think that's the issue with G3's. But doesn't hurt. G3's are not going to lean out unless other mods are added. Mostly has to be three breather mods before this happens. But by that time you should be getting a Uprev and tune.

I'm being told the P2A00 code is the secondary O2's. Not sure myself. If so Uprev can delete that code. I'm currently throwing this as of last week for some reason. I've had the same setup for years. But I have been removing my exhaust a lot lately. This code also is thrown for exhaust leaks. So check that. I have and find nothing. There are many reason one code can be thrown. But if Uprev can deleted, it wasn't a needed code. If this is indeed at secondary O2 code I thought mine was deleted already. Soooo I'll have to get with my tuner.

YeahI am headed to dealer tomorrow to have them check it out.

Spohn is correct, it's the secondary O2 sensor, bank 1 (driver's side?)

And the dealer, unless they're REALLY cool isn't going to help you since you have HFCs

It's the primary sensor NOT the secondary. Also I believe bank 1 is the passenger side.

Got the code myself a few hundred miles after my LTH and CBE were installed. Never did find out what was causing it. Just recently disabled the code in Uprev for the time being. Once I get tuned I plan on enabling the code again to see if it comes back.

Also this is one of those codes that requires actual drive time to come on. It's not just "problem and on" like other codes.

Quick google search gave me this: P2A00

Yea that sounds right. Mine happen after a few hundred miles after my headers but I had a tune also. Guess I'm going to perform the mixture ratio self-learning procedure. It's pretty easy.

How does one do that?

I assume this is covered in the service manual somewhere? If so where?

If you bump up to premium membership those codes go away:p

If I remember right you unplug the Maf. Start car for 10 secs. Turn off. Should threw another code. Delete codes. Plug Maf back in run car for 10 minutes. But I'll have to recheck the procedures to be sure.

But I have also just removed all EVAP equipment. Maybe it's related maybe not.

I thought thats how u did that. Did it this afternoon and it came back on again.

Right now I'm not worried about it so much. I keep deleting it for now. I have others to worry about with a track day next week. I'll take it to my tuner after.

Yeah just found it.

When I did it I disconnected both and it didn't even run for 5 sec. So bank 1 is passenger side correct? I also happened to do this when it was cold....didn't remember that part bout being warmed up.

Would this have any relationship to installing a cold air intake?

Service Manual: P2A00

http://i393.photobucket.com/albums/p...pseab76956.jpg
http://i393.photobucket.com/albums/p...ps8598a70f.jpg
http://i393.photobucket.com/albums/p...ps923858db.jpg
http://i393.photobucket.com/albums/p...psb24162b7.jpg

Thats a lot of info for a weekend mek a nic like myself. Will try what gomer said...if not since its a/f related and I never touched the afr sensor then maybe I will let the stealershit have at it.

UPDATE: Today I decided to troubleshoot. I called Z1 and talked to Spencer. I told him what is going on and he agreed that it mostlikely seems like a intake problem. He suggested cleaning the MAF. Also suggested spraying down the car with some sort of cleaner to see if there is a vaccum leak. I sprayed and really didn't find anything wrong. I did however notice that the pcv hose from the baffle box to the intake was loose on the driverside so i replaced them with some hose clamps. I cleared the code and went for a quick 30 mile drive. 15 miles in and it showed pending falult P2a00. So on the way home I youtubed a video in reguards to cleaning maf's and did that when I got home. Before going on the drive I decided to make the car re learn the a/f ratio by attemtping gomers dug up instructions on relearning a/f ratios. Went on the drive and 30 miles with no P2a00. This might solve it. Im thinking (still learning about this car, all pointers are appreciated from the penut gallery) that due to having a possible dirty maf sensor the car will lean/rich out to correct the air/fuel aratio and it happens to lean/rich out of spec due to a dirty or false reading from maf sensor?

Interesting. But I wouldn't put a lot of fate in just thirty miles yet. But cleaning the MAFs might be a common maintence at regular intervals sooner than normal. Especially with after market intakes.

I agree, more time will tell if the ses comes back. Its just that after 15 miles when I reset it initially it came back on, and after 30 it didn't. Time will tell, if this doesn't work its back to the drawing board.

I'm going to buy some MAF cleaner tomorrow. I've done all sorts of maintence this weekend for my track day next weekend, might as well do this cheap fix.

Im interestrd to see if it helps. I did notice that my car was accellerating smoother after cleaning the maf's. Not sure if its a solid fix or not...will know Monday.

Mine seems to run fine but startup acts weird.

Rough idle?

No. Just start up, sometimes. About 40% of the time.

Have you tried seafoaming the intake? They sell it at most auto parts stores....it brought some of my old cars back to life!

Dealership said the hfc's are causing the car to lean out.

Roy's Z - Did you ever resolve your P2A00 issue? I have been getting it after my CAT back system install (have G3 installed also) and it keeps coming back. Was having issues with this code previously after warranty engine replacement (oil consumption issue) and reinstallation of my G3, but thought is was resolved (dealer replaced A/F sensor 1, bank 1 and when code came back they replaced the exhaust manifold gaskets). Had no issue for several thousand miles, then just recently put on Cat back exhaust and the codes keep coming back. Looking for answers. May try the MAF cleaning. Not sure i was tracking with exactly how to do the by the book learning procedure above. Note that prior to the engine replacement I had the G3 installed for 6 months with no codes or issues at all.

Might be a MAF sensor on the blink, may need replacing. If you installed HFC's when you installed the catback exhaust, then you need a tune. Last, it may be an exhaust leak in the catback ( possibly a gasket) not being torqued down enough.:driving:

It appears that I am getting these codes due to the hfc's I have on the car. Dealership told me that my car is running 127% which is extremely rich! And also I noticed it while driving the same way I always do, a lss in mileage. I also tried cleaning maf's and it didn't help any. Im getting multiple random misfire along with the p2a00. All should be fixed after my tune In a few weeks.

So just as an fyi for myself. If I run a cbe, keep the cats and install a cai with no tune. Will I throw a cell? I know I shouldn’t be due to having the cats and have had other cars with this type of set up. But I’m reading a lot on the Z getting cells after G3's? Any insight would help.

IMO, the code happening after the air intake install doesn't necessarily mean the intakes are at fault. I personally think there's a small exhaust leak between the headers and HFCs that was small enough to not trip the code until the stillen kit was put on. The typical code for the stillen intakes is P0300 random cylinder misfire. Kind of weird that isn't happening here.

I personally experienced this issue and went through all the same troubleshooting. New hfc gaskets solved it:

http://www.the370z.com/intake-exhaus...testpipes.html

Had my wife step on the gas while I checked bare hand ed d and never felt a thing....I got the 300 code as well....oh well...tune will fix it.

I have gotten the 300 code as well after both the G3 install and the FI cat back system but it is not consistent, in fact very rare now, but the P2A00 is nearly a daily arrival.....reader shows the code pops up once, and when the ECU throws the code the 2nd time is when the light comes on.

Questions:

1. Will a tune fix the P2A00 code?
2. For the short term, should I be concerned that the P2A00 is the cause of the light (i.e: any engine damage concern due to the A/F mixture being beyond the cars allowable limits)?
3. If a tune is a recommendation, can any reputable shop do it? I don't have an UPREV tuner in area which is one I have seen folks refer to.

thanks in advance...