I have a 2006 S' manual, and just had a garage install my Injen CAI, PPE headers/cat, and magnaflow cat-back system. After pulling out, my check engine light came on and I had the codes read today.. They are:

P0171
P0037
P2196
And 2 of them codes were repeated showing 5 codes on the scanner..

We had to weld a bung onto the midpipe just after the header for the o2 sensor and the o2 bung after the cat was just placed where the bung was on my new setup.. I'm not sure what the cause of the problems are but going into the installation I had no CEL's so I'm thinking it has to do with the 02 sensors or something.. My rolla seems to run fine, but when I put gas in the car and started it back up it stalled out a few times until I went a mile or two then idled fine.. Can someone please help me out!! Thanks guys

all thje codes refer to the o2 sencors check the wiring on them and it installed right

There are 2 sensors, one before cat and one after.. My new setup included a bung for the one after but not for the one before so we welded one onto the midpipe just after the header.. Wiring had to be added to the 02 sensor wiring to make it longer so it could reach where it plugged into.. This was done with both of them..

The one before the cat is very important, that is the cars AFR meter for 2005 models and up, it has to be installed correctly, NO WIRE CAPS!!!. The 2nd sensor is a long term fuel trim sensor, it reads the performace of the cat and tells the ecu if after the emmisions pass thru the cat if its still lean or rich.

I need to know exactly what each code means to help you.

Iff you get a code that says ineficient cat (aftermarket cats do this) then you need a o2 defouler, which i can show you how to make for less than $5 at auto zone, this will take away that code.

Please list me the codes and desc, i dont have time at the moment to look them up, thanks.

Also, the front o2 sensor needs to be the same distance from the head as the stock one. If you welded the bung to far away, it will read a slightly lower afr and could throw a code, just FYI.

My front o2 sensor is nowhere near where it used to be. My car seems to be running fine though.

the front one has to be as close to stock placement as possiable cause it will give bad readings that could be y ur getting the p0171 system bank 1 too lean

It was moved back a good amount due to the PPE header being longer and not having a bung on it.. So the bung was placed just after the header, at the end of the midpipe.. It's as close to the header as it can be so that shouldn't effect it

P0171 is system lean bank 1..
P0037 is Oxygen Sensor Heater Control Circuit Low. (Bank 1 Sensor 2)
P2196 is oxygen sensor 1,stuck rich

Well if you just had the P0171 i would say that is due to the o2 sensor being to far back on the midpipe and needs to be installed closer to the motor.

But since your getting a rich and lean code on the same sensor and a heater code, you must have something wired wrong. Unless these are all old codes that you never reset, in that case you need to kill the batt, make sure your ECU resets, then drive the car, might take at least 20-30 miles of driving, but if its bad wiring, should be as soon as the car warms up, then go read the codes again.

that is some real crazyness. definitely need to reset the ecu and start over

I had no codes before putting the stuff on and now I have the 3 I mentioned.. Autozone read the codes then reset my light and it came on immediately after I started it and went like 1/4 mile.. Do you think it's a wiring problem with the o2 sensor?

Yes, also, how did you conect the wires

The wires needed to be extended after putting the new piping on so the wires were cut 1 at a time, then wire added to make longer and sod'ed together then moved on and cut the next wire and did the same thing until all wires were extended.. This was done for both o2 sensors

This is interesting cause I have the same P0171 code but I have an Injen CAI installed. Do you think it could be that my O2 sensor doesn't like the CAI?

And as for this, I agree with everyone else, I'd say you need to look at the wiring for your O2 sensors

went to a friend and he hooked it up to the scanner and watched things that were happening as he rev'd it up.. The o2 sensor on the graph was flatlining and he said normally they only flatline going downhill and it shouldn't be that way, plus the voltage was way down.. So it's either the wiring or i need new o2 sensors.. Hopefully that fixes all the codes im getting

cool dude, let us know.

Will do, I'm learning quite a bit bout the rolla lately, mainly cuz of CEL's lol

Okay I guess my stock computer learned the one problem and fixed it itself but I still have 2 codes.. They are P0171 (lean bank 1) and P0037.. Anyone have any ideas, or does it still sound like its both o2 sensors or something?

P0171 is usually caused by an intake, thought we'd been down this road with you.

I had this same problem rocking the same codes during my turbo install when i extended my o2 wires out. you have to use a specific wire to extent those o2 sensors out (like go to a junk yard clip the wire off of a junked car's o2) and you have to soldier every thing. I would almost bet it's because you pulling to much resistance through the wire to the o2. and you can check that by pulling out the fluke and checking the o2 at the o2's connector

We have been thru this before but it was for an intake made for an 03-04 rolla and was a k&n sri.. I have an injen cai now made for my 06..

how do i check it specifically??
The guys that extended the wire just used reg. wire that he had at his shop at the time and the used sod that he held to a lighter and melted, then hardened.. That is probably the problem there and if new wiring doesn't work then it's time for new O2's..

Hughes, what u think is the p0171 cause? Last time i had the code it was due to vacuum lines being crossed.. Would fixing the o2 wiring fix the lean bank 1 code also?

Hey man just call me Jason, but any way....

look brother you need to pull out some type of precise multimeter and test it. here is a site where you can do that http://www.buzzle.com/articles/o2-se...2-sensors.html . Next you have to understand what your car is doing because it's all relative to each other. provided you gave the codes in order...

P0171 is system lean bank 1..
it thinks that it's lead even though it's not could be two reasons your wires are to long giving wrong signal to ecu or your o2 is to far away from your head..... the second reason doubtful but possible
P0037 is Oxygen Sensor Heater Control Circuit Low. (Bank 1 Sensor 2)
this has nothing to do with any thing other than your emmissions sensor is taking to much juice to work.
P2196 is oxygen sensor 1,stuck rich
this one corresponds to the first code. your car reads lean so it compensates by going super rich.

i would make sure that the Bank 1 Sensor one is as close to the head as possible while still being at a point where all four tubes for your header comes together. the second thing i would do is make sure you go to a junk yard and gather up some o2 wire from the o2 sensors from the junked cars and redo your o2 sensors. make sure they're soldered and has heat shrink tubes around each wire. reason being that wires is a solid strand nickle wire and it has a certain impedance that is designed to have maximum flow. to top it all off that type of wire is all through out the harness to your ecu and the copper wire that is sounds like was used is not going to read the same. now if you had a piggy back or stand alone engine management then you could compensate by changing the o2 values. so that's what i can gather so far from every thing that you told so far and they symptoms that you got

FYI here is the wide band o2 color codes

That's a hack job on the soldering, and a lighter will get NOWHERE near hot enough to properly melt the solder. What you probably have are a set of cold solder joints, which are causing much of your resistance. I'd take it back and demand they do it properly, and watch while they do it.