Hey guys searched and found lots of information on a code P1283 but havent heard much about a solution. I have read that replacing the sensor on the bank that has the problem could fix it or drilling out the non foulers depending on if it was reading lean or rich. Does anyone know what the real fix is, i have a 04 made in 11/03 which means it should really be only a 04 not a 04.5 but i do have a/f ratio sensors and from what i understand the 03 and early 04 should not have a af sensor just a normal 02. Just FYI i have jwt pop, tp, and apexi axel back. The ses light only comes on about ever 300 to 400 miles. Any info would be great thanks guys...

 

I have the same problem.

I took my o2 sensor off the driver side about 2 weeks ago. I tested the leads for resistance, and all prongs were dead, so the o2 is dead. I bought a new one from a forum member here. I tested it before I put it on and it was working. I also installed spark plug non-foulers since I plan on getting test pipes soon. I still have the stock cats. After about 200 miles, the light is back on, and its the same code. I'm not quite sure what the deal is, but I think my driver side cat is melted or something.

-Acree

 

According to the FSM, P1283 indicates that A/F sensor 1 on bank 2 is reading a lean condition. The possible causes are:


Air fuel ratio (A/F) sensor 1

Air fuel ratio (A/F) sensor 1 heater

Fuel pressure

Fuel injector

Intake air leaks

As you can see, you have to look beyond just the O2 sensors.

 

Ive looked into air intake leaks and have none of them i pressure tested the plenum, i will ohm out all my injectors tomorrow and see where they are at im really expecting to see nothing wrong with the injectors. The fuel pressure im not sure how im goin to test that i guess i will buy a adaptor to test if it comes to that. I will also check the resistance on the wires of the af sensor and the post cat o2. If any one has anything elese feel free.

 

anyone?

 

ttt

 

Hey Jarred, I'm still throwing the same P1283 code we were talking about back at TGP last month. I got a copy of Cipher for Christmas and did some data logging this morning and found something interesting that might help.

When I logged the NB-O2 SEN 2-B1 and NB-O2 SEN 2-B2 I found that the values on SEN2-B1 ranged from 0 to .96 while the SEN2-B2 stayed steady at .28. The non-fouler I had on B1 came off (long story) and right now the sensor is directly into the test pipe while the B2 is still on a non-fouler. I'm wondering if maybe the non-fouler isn't getting enough air flow to the sensor and the ECU is thinking it's lean because it doesn't have much of a signal (the way I understand it rich/lean is computed from some formula of sensor 1 vs sensor 2) - or the B2 sensor is screwed and just reading .28 all the time regardless. I think I might pull out the non-fouler and see if the readings change on the B2 sensor. If it doesn't I'll assume I got a dead sensor and swap it.

I'm a total noob when it comes to this stuff and therefore probably way off base but maybe it will spark an idea or two...

Data log attached, rename it to .csv...

 

I have actually been researching this ever since I got the CEL (almost 3 years ago lol)..

O2's
MAF
Intake/Exhaust Leak
Fuel Pressure

I've actually checked ALL of them.. replaced o2's, MAF's, Joints/clamps, Sparkplugs through 3 years and I still have the CEL.

I'm subscribing so I can follow this thread lol.

 

Downshift - what breathing mods you running? Both Jarred and I are running the jwt pop, test pipes, and exhaust... I'm wondering if we're making it breathe too much and we're going off the scale of the lean limit the sensor can read. Bigger injectors to get more fuel maybe?

 

Ok, climbed under the car and took off the non-fouler on sensor 2, bank 2 - everything is non-fouler'd. I ran Cipher again and was able to pull back similar values for bank 1 and 2. I also noticed the end of the sensor was covered in carbon, whereas the sides of the sensor were not. My hunch is that the non-fouler, the DIY kind spark plug foulers drilled out, didn't have enough room for the sensor to read properly so was stuck at just reading a partial exhaust measurement (?). I cleared all the codes so I'll find out in 200 miles if it comes back.

 

I have turbonetics and other things in the car. I even tried to tune it out with a Utec thinking I was spitting too much gas or running too lean.

There is a common problem with some TN and other turbo guy here.

 

You were monitoring Sensor 2 on Banks 1 and 2? DavesZ#3 said the code pertained to Sensor 1 Bank 2, so you might want to go back and log some data on both S1B1 and S1B2. If your Sensor2 Bank 2 is not switching rapidly, that is also a problem and the sensor itself or catalytic converter may be faulty.

 

I was monitoring all the O2 sensors, bank 1+2 and Sensor 1+2. S1B1 and S1B2 both showed a good voltage. After removing the O2 fouler on S2B2 it's signal matched S2B1 so I think the sensors are all ok. No cats, got test pipes instead.

 

Just a quick update. I've put about 500 miles on the car since I took the O2 fouler off and so far no SES light. It was popping up at idle in traffic but not anymore. Ironically, no SES light from the rear O2 sensors either complaining about the missing cats...

 

By "fouler"....are you refering to what I purchased as a CEL (Check Engine Light) eliminator when I bought test pipes? Basically an O2 extension that moves your sensor away from the exhaust. We're trying to UTEC tune my Z with the CEL's installed but maybe should remove them if you're not getting any codes.

 

Sorry to bring this back to life.
I am also running a P1283 code. and along with it, a P1273 code. I have the nonfoulers on the O2 sensors in my testpipes. I have a HKS replica and a plenum spacer. I had P1273 before I got the exhaust on but now that code has gained a friend.
Ive heard all kinds of solutions to this problem. I have already checked for air intake leaks (none that I can find).
I heard that switching the 02 sensors around can sometimes solve the issue (if anyones done this, can they expand upon this)
Ive also heard that removing the nonfoulers can help.
Also do both of these codes pertain to the upstream o2 sensors that determine AF ratio?

I have an 04 Z coupe, not an 04.5.

Thanks

 

Also, has anyone fixed the CEL issue for these codes?

 

Bueller? Bueller? Anyone?

 

at least someone knows what the search function is

 

*bump* same issue