Inifiniti I30t P0450/P1446

[mfarshad]

Recently I took my car for inspection it failed with these codes P0450and P1446.I looked at the codes but do you know how to fix these!!

P1446 looks like is translated to P0440 it is related to Evap canister!!!where is that?How about P0450? do you know how to fix this?

Could these two codes be related to same problem that Evap Canister vent valve is closed/faulty and it causing the P0450 code to show up as well?

I have a broken Vaccum cut valve which I need to change that, The pipe that it comes from gas tank to the vaccum cut is broken off, so it looks like the air/gas coming from the gas tank is leaking to the air .. The robber hose is hagging in the air with plastic part in the hose. Go figure.... I will order that part on Moday replace it and reset the codes. But how the system does not show leak in the codes?

Thanks,Farshad

Modified by mfarshad at 12:55 PM 4/16/2005

Modified by mfarshad at 7:09 AM 4/17/2005
Modified by mfarshad at 7:10 AM 4/17/2005

[maxhopper]

Please state what year your car is, and (if you know) whether it is Federal or California emissions.

[NISTECH]

It wont show a leak code if it cant successfully get that far in the test. It will stop the test and report the faults it found first. The computer uses a bit of logic, While its testing it says to itself ,ok if this part is failing there is no way in hell I am going to be able to test this part. so thats lilkely why your not seeing a code for leak.

[mfarshad]

HI

Do you how reset these codes P0450 and P1446?

If I do not have scanner looks like there is reset button somewhere?

Thanks,Farshad

[maxhopper]

Edit: incorrect info
Modified by maxhopper97 at 11:22 PM 4/19/2005

[NISTECH]

That doesnt work on cars built 1996 and newer. you have to either do it with the ecm screw or with a scan tool.

[mfarshad]

NISTECh

Where is ECM Screw?

[NISTECH]

I do believe on the A32 it is right next to your gas pedal. There is a cover next to the pedal inline wiht your center consule. pop that cover off,should have a couple plastic retainer clips holding it there. When you remove it you will see the back of the ecm. and a small hole with a flat blade screw in it. Turn your key to the on position[car not running]. note where one edge of the screw is pointing at a line on a sticker on the ecm. now gently turn it till that edge is pointing to the other line[DO NOT ROTATE THE SCREW ALL THE WAY AROUND] There are stops in it to let you know where to stop but they are hard to feel so use visual to know where to stop by lineing up the edge of the screw with the lines. When you have it rotated to the other line watch the little leds in the computer right next to the screw. they will flash in sequences. 1 flash pause,2 flashes pause,3 flashes pause.... it will do this to 5 and then start over. when it gets to 1 again rotate the screw back to the first mark and turn the key off. this should erase the codes.

[NISTECH]

I should add also that if your state checks SRT moniters as part of the emissions inspection,you are going to need to drive the car till it conducts most or all of those tests. What they are is Self Readiness Tests. Meaning the car checks all of its functions of emissions copmonents. on your car you should have 5 visable tests that can be seen on consult and 3 non visable that generic scan tools can see, the 3 you dont need to be concerned with cause they run imediatly upon starting and driving the car, the other 5 are time tests that require specific conditions to be met for the tests to run. They 5 are EGR,O2,O2heater,EVAP,and Catalyst. The first 3 happen pretty quickly the Cat test no much longer, The evap test takes a bit of driving for it to complete since it tests multiply functions of the EVAP system. I believe under perfect conditions its around 17 mins.

[mfarshad]

NISTECH

Thanks that did it, But i did not see the diodes flashing!!! but serviceengin light if off now.

Now I have to go and buy the Vaccumm cut valve for my Infinitiand replace it. The part number is 17372-1w200. Infiniti dealer in Nashua, NHsaid $84!!!

Is this part only dealer item? WHere can I shop around?

[NISTECH]

try here.http://www.trademotion.com/par...14024

[audtatious]

U Da Man, Scott!

[mfarshad]

Another problem I am having in my dash is that the "Air Bag" is flashing .My 1998 Infiniti I30t car has 159000 on it.

Do you know what is the reason for the Air Bag sign to be flashing?

Thanks,Farshad

[NISTECH]

do you have side impact bags? they would be in the sides of your seats ,there would be a tag along the outside edges of the seats to indicate it.

[mfarshad]

Yes My car has side bags!!!!

[NISTECH]

there may be a code stored for the side bags , there was a TSB about replacing them with updated parts to repair it, if that is not the code stored then it is likely a control unit code. This code is typically set off in one of 2 occurances, If the car had been in an accident or the battery voltage to it dropped below nine volts while the key was on. In the first case the unit has to be replaced. In the second You can disconnect the battery for an extended period of time [12 to 24 hrs] and it will clear that code.

[mfarshad]

which code that is ?OBD test showed from my inspetion with code P0450 and P1446!!!

Is this code part of diagnistic system, which it does not show?

The car has not been in an accident, my wife hit the one side both doors a while back.... Hmmmmm!!!! that could be it.

[NISTECH]

When she hit the car did it damadge the Bpilar? If so its possible she damaged the sattelite sensor in the pilar. this is the sensor that tells the control unit to detinate the side bag. If the key was off and the system was completely powered down when she hit ,it wouldnt of set off the bag rather showed a cicuit problem on power up and ignored the sensor.

The codes for air bag are pulled from a different control unit there for a scan tool capable of pulling the codes is neccesary. There used to be a way to pull air bag codes by fiddeling with the drivers door switch. If like you got in the car put the key in the ignition turned it to on position for something like 5 secoinds then turned the key off and pressed the door switch like 10 times in 7 secs It would flash the codes through the dome lights???????? I have not done that procedure in several yrs since i have the factory scan tool at my disposal. So some of it might not be correct.

[mfarshad]

The damage is very minor scratches on the back door!!! she was driving at the time of impact and hit a pole on the side.I will try reseting it by turning the key on and then press the switch door( Is the switch door is the same as the switch which Bibbs at you when the door is open?)

[NISTECH]

yes but that wont clear the code it will only make it flash the codes via the dome lamp. try unhooking your battery for the night.

[mfarshad]

Dome Lamp.... where is it?

[NISTECH]

its the light that illuminates your interior when you open the door.

[mfarshad]

HI

I have changed the vaccum cut in my I30 near the Canister, this is a plastic part with 4 hoses. I reset the computer clock and ran the car for 750 miles. The check engine light came on again. It did fail with another code P0134(Bank 1 Sensor 1) Before it was failing for P01446 and P0450.

I took my car to Autozone and they check it with a scanner, now is falling for with code P0134(Front O2 sensr, bank 1 high voltage). Is this mean the sensor is broken?

How many oxygen sensor there is?

I see one on front pipe behind the radiator , I see one on the second pipe coming from back of the engine( the other cylinders) and I see one on catalic converter!!!!

which sensor is Front sensor bank 1?

Does all of these sensors needs to be changed?

How do I fix this?

I have done some more reasearch and I talked to oxygensensor.com with a guy who said that Front o2 sensor bank 1 is the one that is in front but near the fire!!! which is very hard to get to near the left front right tire. I can see this sensor from the right side of the car. He mentioned that these sensors needs to be changed every 80000 miles.. My Car has 162000 miles on it.

DO I need to change all three sensors? Thanks,Farshad

Modified by mfarshad at 11:13 AM 5/20/2005

Modified by mfarshad at 11:26 AM 5/20/2005

Modified by mfarshad at 12:02 PM 5/20/2005

Modified by mfarshad at 12:59 PM 5/20/2005

Modified by mfarshad at 1:01 PM 5/20/2005
Modified by mfarshad at 2:57 PM 5/20/2005

[NISTECH]

no you dont need to change all three only the one failing. Bank 1 is the bank with cyl 1 on it. Bank to is always the bank with cyl 2 on it. You # 1 cyl is on the rear bank near the back of the engine compartment.

the other o2 on the pipe below is the rear o2.

[mfarshad]

hi

I have not changed the o2 sensor but the Engin light has turned off by itself!!!

Does this mean that o2 semsor is working now?

Can you comment on what type sensors are better to buy!!!is after market is about $63, are these ok.

Thanks,Farshad

[maxhopper]

It just means that it is on it's way out. My CEL came on months ago for my front bank O2, I reset the ECU and it just came on again last week. I went ahead and ordered a new sensor when my CEL first came on, so at least I have it handy for the install. I'm pretty sure the brand I got was Walker with the OEM plug, since I didn't want to mess with splicing and soldering the old plug on a universal sensor. I replaced the rear bank O2 last year with the same kind, and haven't had any problems with it.

[mfarshad]

I took my car for the inspetion and it passed .The engin light it went off by itself, If is going to turn on againI have to buy the O2 sensor and replace them.

The original problem with P1446 P405 codes went away when I changed the Vaccum cut(with four hoses) plastic piece near the Canister and reset the computer clock. Then the O2 sensore bank 1 it came on and now it has turned off by itself the engin light temporarily is off I guess untill is going to fail.

Thanks for your help,Farshad