L337350

iTrader: (19)

a few days after i put headers on my Z i got a SES light, so today i checked the code over at autozone and it says this:

i have 2 P1283: Air Fuel Measurement
and 2 P1274: Air Fuel Measurement

Anyone get these? Is it something to do with the O2 sensor? I pushed erase on the device they gave me at autozone and the light went away, but the problem isnt solved... any ideas?

L337350

iTrader: (19)

anyone?

jackwhale

I don't have any experience with this but if the SES light comes on again, I would take it to a good mechanic to check it out with their more sophisticated testing equipment.

Tony@Performance

iTrader: (16)

quick question...
with those problems, did you notice any stalling?

Highrevs350z

I had the same codes that came on after installing headers and race pipes. They are Lean Condition Codes, one from each front o2 sensor. I have spent hours at nissan trying to figure out what is causing the problem (the techs said i was running 120-130% lean) And after replacing the front o2 sensors and the MAF, I was still getting no where. There is a company technosquare that does custom ECU flashes (cost $599), which could possibly fix the problem. I opted to take the headers and pipes off..... The light still came back on even after the headers and pipes where off, and I had the dealer clear the codes and reset the Learn.. and once agian. it came on agian. The only thing I have on the car is a nismo CAI. This is where I am at so far. If you get any further with this let me know.

G3.5T

In the same boat with those 2 codes but after a Turbonetics S/T kit install which does delete the cats with a straight pipe. Has anyone found a solution???????

stein

iTrader: (3)

What has worked on other cars, mostly 4cyl, is cleaning the MAF sensor or TB to get the lean code(s) taken care of. I don't know enough about the Z at this time but it may be worth a shot.

G3.5T

Cleaning it with what? How, spary with something?

stein

iTrader: (3)

With the Celica say I would unplug the MAFS, remove it and then spray it with a non-choloric brake cleaner or electric cleaner.

Here is what the Celica guys do
http://www.newcelica.org/forums/show...ight=clean+MAF

L337350

iTrader: (19)

hm, just saw this was resurrected recently... i took the car to street image to get fixed and they said the o2 sensors were on backwards and they sprayed the maf to clean it.. no codes for nearly 10 months

craZ350

have the same codes...i will try switching my o2 sensors, hope it works for me too....thanks for the reply

G3.5T

Which ones? The ones at the rear of the exhaust on the test pipe OR the ones up top in the engine bay?

On backwards you mean the 2 where swapped in each others place?

G3.5T

This fixed my problem with these codes. The 02s where on backwards. Swapped them, no more codes, its been 300+ mi.\


These were the 2ndary 02's. The ones that were on the left and right cats.

jlimquest

iTrader: (2)

Can you post a pic & let us know whisch one's goes where?
Thanks,
Jeff

EM-EFER

iTrader: (6)

There color coded........ How could somone reinstall them incorrectly????

jlimquest

iTrader: (2)

We have a different downpipe when the TN kit was installed.

G3.5T

If you are still getting the codes just reverse them. Its hard to explain which one is where on the downpipe. It depends on if you look under the car from the drivers side or the passenger side.

For what ever reason they do need to be installed on the proper port on the downpipe or those codes will trip. Guys running test pipes are running into this problem as well.

Highrevs350z

Can you elaborate on the switching of the o2's. are we talking the front o2's on the headers or the rear o2's on the test pipes. I still haven't fixed this problem.