Post FI HFCs Install/ SES or CEL Help!!
 

See pics!!!!


Hey fellas, I need some help, so I had my Fast Intentions Non Resonated HFCs installed about a week ago. I got a couple Service Engine Soon indicators go off. I bought a OBD2 reader.

Here are the codes, if anyone can help, or atleast point me in the right direction as to how I can fix it. I'd love you forever. I took it to the dealer, and they wanted to charge me because my car has been "modified." The mechanic did try to clear the codes, they wouldnt clear.

Any ideas?


P0031 Heater Control Circuit Low (Bank 1, Sensor 1)

P1148 --- 1. Closed Loop. 2. Closed Loop, Bank 1
Fuel Sys 1 -- OL
Fuel Sys 2 -- CL
Calc Load (%) -- 18.8
ECT (Celsius) -- 89
STFT B1 (%) -- 0.0
LTFT B1 (%) -- 0.0
STFT B2 (%) --2.3
LTFT B2 (%) -- 0.0
MAP (kPa) -- 28
Eng RPM -- 663
Veh Speed (km/h) -- 0
Spark Adv -- 9.0
IAT (Celsius) -- 38
TPS (%) --0.8
O2S B1 S2 (V) -- 0.280
STFT B1 S2 (%) -- 99.2
O2S B3 S2 (V) -- 0.280
STFT B3 S2 (%) -- 99.2
Run Time (Sec) -- 177
MIL Dis (km) -- 0
LAMBDA B1 S1 -- 1.002
O2S B1 S1 (V) -- 2.257
LAMBDA B3 S1 -- 0.996
O2S B3 S1 (V) -- 2.207
Command EVAP (%) -- 0.0
Fuel Level (%) -- 100.0
Warm_up DTC Clr -- 0
Clr Dist (km) -- 0
EVAP_VP (Pa) -- 0.0
BARO (Kpa) -- 100
CAT Te 11 (Celsius) -- 20
CAT Te 21 (Celsius) -- 20
ECU Volts (V) -- 14.240
LOAD Value (%) -- 15.7
EQ Ratio -- 0.999
Rel TPS (%) -- 0.0
TPS B (%) -- 0.8
ACC Pedal D (%) -- 0.0
ACC Pedal E (%) -- 0.0
Command TAC (%) -- 0.8
MIL Time -- 0h0m
Clr Time -- 0h0m

***Update 1 January 2013***

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may want to post this in the exhaust section for more views...

Intake/Exhaust - Nissan 370Z Forum

Did triple move this? Im sure he did..:tup:

Just a guess but I'm gonna have to say that your primary bank 1 O2 sensor is either bad or the wiring is messed up. Reason I say this is the P0031 code. Just can't see that popping up unless the wiring or sensor are junk.

Brother, please tell me more, what do I gotta do? what do I gotta check?

Did these codes pop up right after the install? Sensors could have been damaged during the install. You could get an Uprev tune in which they will delete the loop to the O2 sensors on the cats so you'll never get a code.

yeah man, as soon as we finished the install, turned on the car.. they came right on. I was told to stick some steel wool inside the j-bung of each cat. That unfortunately didnt clear any codes.. ughhh.

I may have to look into getting a tune. I would like to fix it without getting to that point, but I might just have to.

Does your cat have O2 sensor anti fouler extenders on them? If not, you could buy some and see if that helps.


*Edit... I just re-read your original post and realized you have FI cats, so you already have the extenders on there. Hopefully the mechanic didn't use any impact/air tools to get your cats off, as that can easily damage the sensors. I'm thinking one of the sensors is damaged and needs to be replaced.

Sh!t, Im not sure what that is... damn.

I just googled it, and on another forum, a guy was saying something about those things cause fuel problems. Im not sure if thats the case with our cars, but I'd be willing to check it out, and give it a shot.

Hey OP, your FI cats already have a "J" style type of extender on there... So honestly I think one of the sensors was damaged during the install.

Yeah, we did use impact wrenches. I was told theres o2 sensors obviously on the bottom of the cat, but also 2 in in the exhaust manifold, is that right? (one on each side?)

Brother, can you tell me what I need to replace?

Yeah, you are right on the O2 locations. I can almost guarantee that a sensor was damaged due to using impacts tools. Thats is a huge NO NO when it comes to removing the cats or exhaust manifolds! Or atleast remove the sensors first before you use impact tools

Well, Now I know brother, I gotta pay for the mistake. Dude, it was such a nightmare getting that demon bolt off. fuuuuck.

Is it hard replacing those o2 sensors on the exhaust manifold?

Well lets get some more people to chime in first. I'm just assuming but you never know, may be something simple. No, its not really hard to replace them, its just the o2 sensors for our cars is really expensive.

Brother, Im starting to think this right on the money. Im gonna start looking for them.

Wow. It has to be a damaged sensor. I just had the resonated version installed last week and no light. But I did have the privelage of having the boss Tony do it.

Ahh dude, thank you man, thank you soo much.

UpRev.....Uprev....Uprev. Eliminate those O2 sensor inputs to the ECU.

You can't eliminate the ones on the exhaust manifolds can you? The code come up as bank 1 sensor 1... isn't that on the manifolds, not the cats?

I mean, if its a bad sensor on the intake manifold, i wouldnt be surprised, we did everything but nuked that damn demon bolt, it was that bad.

Yeah its your sensor same codes happened to me when I installed my headers. You can double check the sensor with an ohmmeter though. I pounded on it too hard trying to get it out of the cat.

was it a pain in the azz replacing that sensor? you had to replace the sensor on the intake manifold right? (passenger side)

I dont see how it couldve been damaged on install. That error code relates to the sensor on the manifolds not the cats. That is a precat o2 code. Those were not touched at all during install of the hfc's. Did you make sure atleast that sensors are plugged in and are not loose in anyway?

I lifted up the front end of the car, to put the steel wool in the J-bung, and I checked the 02 sensors, I didnt see any issues with them. I didnt look at the o2 sensors on the exhaust manifold, because Im not sure where to look for that. But its looking like thats where the issue is. It just makes sense.

You use an impact on the demon bolt? Anything at all other than a ratchet/wrench?

Did you beat on the ratchet/wrench with a hammer?

Dude, we did EVERYTHING humanly possible to get that fricken bolt off.

Im not even kidding. Im dead serious bro.

Then that sensor is dead.

They're really quite fragile.

We pretty much used every possible combination you can think of. By far the worst demon bolt we have ever dealt with.

That still doesnt explain how its the manifold O2. Ive never broken an o2 before either.

EW ill you send pics of where this o2 is at then.

Just the vibration alone from impact wrench can damage those sensors, even the ones on the manifolds. I've seen it happen with the 350z guys. Hopefully that's not the case with the OP, but it's sorts sounding like that's the case.

The demon bolt connects the cat to the Manifold.. Any vibration put into that bolt is going to rattle everything in the system, but especially the manifold itself. The O2 sensor we're talking about is like 1.5-2 inches tops from that bolt...

It's dead, Jim.

thank you soo much bro, please.. please do that.

attached.

Im leaning that way too, I've already started looking for replacements. I found a couple of them (used) on eBay. What do you guys think? good idea or bad getting them off eBay?