[Cheeto]

UPDATE: SES Light: P0455 and P1448 With **PICS**

Ok, recently I have had a number of issues with my 2000 Sentra GXE. About a month ago the SES light came on for the first time and I took it to the dealer for a recall peice. I had the car's codes checked out at autozone and it was running too lean. Had the MAF replaced and all was good for 2 weeks. Now I get the p0455 and p1448 error codes. I have read the service manual and checked the obivious things like fuel cap(even bought another) and it still hasn't helped. What is wierd is that it'll go away briefly after a day or so. What i am wondering is is the evap system pressurized?? So if I take off the evap canister valve can i damage the evap system? If anyone has any experience with the evap system any pointers would help me out. Thanks.

Updated: I started looking in my engine bay and found a loose hose. I've check the service manual but I can find in the manual or see with my eyes where it needs attached. I have attached pics if anyone can help me out, thanks.

 

[angel2167882]

Maybe with years, the gaz tank or something related to leak and the tank lost it's pressure...

I would have a mechanic inspect it.

 

[Cheeto]

Just added pics for a loose hose.

 

[RACEFACE]

Isn't that hose the tranny breather tube?

 

[Phill The Thril]

That's your tranny breather hose.....
that's not causing your codes.....

 

[MN01GXE]

Isn't that hose the tranny breather tube?

Don't worry about it, that end is supposed to be open like that.

 

[Cheeto]

Thanks guys

 

[MN01GXE]

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

With a p0455, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, and/or
* Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

--------------------------------------------------------------
P1448 - Fuel Tank Sensor Control Valve Range/Performance

?????

--------------------------------------------------------------

Might want to also PM 2002XE, he had similar error codes and got to the root of the problem with some help from a mechanic (see http://www.b15sentra.net/forums/showthread.php?t=80888&highlight=P1448)

 

[angel2167882]

Yeah that tube is completely normal, it's the tranny breather.

And it's kinda suprising from Nissan it don't go back into the intake like all the other anti-pollution thing that goes back in there on our cars

 

[SpecVB15]

i believe the root cause is the malfunctioning pressure sensor in the gas tank check it out.

 

[thnikkamax]

what did you do to fix the problem? I also have the P0455 and P1448 codes being thrown.. as well as P0720

 

[JFP in PA]

OK troops....................

P0455: Gross EVAP system leak
P1448: EVAP vent valve failure
P0720: Output shaft speed sensor circuit

0455 and 1448 are EVAP codes indicating that you have a vacuum leak, most likely due to the purge vent valve sticking open, these are common problems on these cars..............

0720 is speedometer/cruise control related issue..............

Enjoy!