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Old 02-13-2002, 01:11 PM   #1
bliu
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Unhappy P0457

(please ref this thread and this thread)

I have been blessed with the wonderful circumstance of having a semi-troublesome car without a dealer w/in 1 hour of where I live. So I've been resorting to having my car looked at when I travel to towns that have a Subaru dealership. In November, I had 3 CELs - the 3rd one currently still lit. I had the code pulled twice at dealership #1 - P0457. They said that I needed to have the fuel pressure sensor replaced, but were unable to do it for me since they didn't have the part in stock at the time. Next weekend, I will be in another town with dealer #2. I called them up to see if they could get the part in so as to fix the problem when I'm there. They said no can do for a couple of reasons. They don't know which pressure sensor it is exactly and their books indicate that P0457 is only for the Legacy. I had dealer #2 call dealer #1, and they still don't believe in P0457 for the WRX. I called 1800SUBARU3 only to find out (as I'm sure a lot of you already know) that they don't have any technical info. They also told me that since each dealer is independently owned and operated, there's no real communication between dealers unless they choose to do so. They also told me that it's up to the dealer to look into getting technical info from Subaru, not owners like me.

So.

Is there anything I can do (having read the above 2 threads to know that there -is- info 'in the books') to let the dealer knows there -is- a P0457 for the WRX and a possible fix for it?

Does anybody know more about P0457 and what there is to keep it from coming up after each reset?

Sorry it's so long, but hopefully this will help others with the same problem.

Thanks for listening!
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Old 02-13-2002, 03:13 PM   #2
nimbels
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You do have a code for the WRX. The P0457 means that you need to get your ECM reprogrammed. Your Subaru dealer should already know this.
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Old 02-13-2002, 03:42 PM   #3
Jon [in CT]
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P0457 means "Evaporative Emissions Control System - [Gross] Leak Detected." It generally means a loose or cross-threaded gas cap. Although the WRX does issue this code (all new cars have to be able to detect and issue this code), it is mysteriously missing from the WRX Service Manual. However, the Subaru Select Monitor does correctly provide the meaning of this code to the service technician. This explains why the second dealer didn't believe you had the correct code - he looked it up in his Impreza Service Manual and it wasn't there, although he found it in his Legacy Service Manual. If you get this code and you're quite certain the gas cap has been properly tightened, then you should schedule service because this is, in fact, one of the trouble codes for which the ECU will receive a re-flash. If your service center hasn't heard of this, ask them to call the Subaru Tech Help Line.
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Old 02-13-2002, 04:22 PM   #4
bliu
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Well, hopefully next week when I take the car in, they -will- pull P0457. And hopefully they'll believe it's real... I'll make sure to tell them to contact the Subaru Tech Help Line if they suggest anything other than an ECU reflash ... like dropping the fuel tank. Thanks again for the help!
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Old 02-13-2002, 06:43 PM   #5
Bugsie1
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Guys,

P0457 can be due to many things... a loose Gas Cap is the main one SOA's manuals attribute it to.

Other causes from fellow I-clubbers are often loose hoses at the rear of the car (on the charcoal canister box/drain valve??) or in the engine compartment (can't remember where though)

I have been getting P0457s for 3 months and have had all these things checked and had my ECM re-flashed but still no good.

My problem appears to be dirt in the hoses/filter at the rear of the car which is blocking fuel ventilation (or something like that.)

So P0457 does NOT mean you have to have your ECM reflashed, first have a Tech do a FULL inspection of the car and check the fuel system in it's entirity for leaks, loose hoses, blockages etc. This is time consuming and probably not something they want to do. Unfortunately for me this took many many visits to the dealership and calls to SOA for them to actually find my problem and is still not fixed (waiting on parts.)

- Richard.

Last edited by Bugsie1; 02-13-2002 at 06:50 PM.
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Old 02-25-2002, 11:00 AM   #6
bliu
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well, i took my car on saturday for them to take a looksie. they said they pulled p0457 ... surprise surprise! then they said 'we don't have that in our impreza service manual' (like jon said), and that the tech line isn't open on saturdays. they said they'll call for me today and relay the info to me. (we'll see about that) so basically, nothing happened. and they didn't reset my CEL, even ... which isn't a bad thing, because now that i'm so used to it, i'd probably think there was something wrong if it -wasn't- there.
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Old 03-08-2002, 03:44 PM   #7
bliu
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Angry bump ... again

i just called the dealer ... having given them 2 weeks to call the subaru tech line to figure out what to do about a "P0457" for the impreza ... they said that the they haven't been able to get hold of the tech line/the tech line doesn't know still. i say baloney (sounded like 'doh, we forgot to call, better make up an answer') ... i know that some have said ECU reflash, some say change this or that sensor ... does anybody have the official tech line answer?

and does calling 1800subaru3 to report my frustrations really help? the last time i called them they said they can't help with anything technical and blah blah blah ... i'm starting to get quite ... tired, perhaps is the word, dealing with subaru. i'm not sure it's a good thing that i've gotten used to the CEL being on (4 months now) ... there's the thought in the back of my head that if something new goes wrong, i won't even know it.

anyway, just venting a little ... and bored with the little orange light.
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Old 03-13-2002, 01:22 PM   #8
Bugsie1
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Dude - go to a different dealer! They are BSing you, they can quite easily find out what a P0457 is, if they had Technicians that were anything close to knowledgeable they would know a P0457 off the top of their head.

- Richard.
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Old 02-18-2009, 08:33 PM   #9
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Smile

I guess I'm bringing this back from the dead but I just dealt with this issue after a Perrin turbo inlet install (only threw it tonight... a few days after the install!).

I made a quick blog post with pictures of the problem here:
http://drewstechnotes.blogspot.com/2...oblem-fix.html

Essentially the purge control host got disconnected and thus there was a "gross leak". Super easy fix, tricky little item to see and scary as hell when the code isn't in the repair manual.
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Old 02-21-2009, 12:56 AM   #10
lugee
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^^^ thats actually really helpful dude - thanks. I just threw this tonight, I'll check the car later.
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Old 02-26-2009, 10:24 AM   #11
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Quote:
Originally Posted by KW_Scoob View Post
I guess I'm bringing this back from the dead but I just dealt with this issue after a Perrin turbo inlet install (only threw it tonight... a few days after the install!).

I made a quick blog post with pictures of the problem here:
http://drewstechnotes.blogspot.com/2...oblem-fix.html

Essentially the purge control host got disconnected and thus there was a "gross leak". Super easy fix, tricky little item to see and scary as hell when the code isn't in the repair manual.
if it wasnt totally gay.. I would kiss you. I've been looking everywhere trying to figure out where this stupid leak was coming from and sure as **** I go in and look any the blue nipple has no hose on in. Thanks so much, I wansnt going to be able to pass inspection because of it!!! Ive been in there I dont know how many times before and missed it. Thanks again!
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Old 05-10-2009, 03:13 PM   #12
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Another culprit could be the rubber gasket seal thing on the fuel pump assembly housing, especially if you or someone has recently put a new fuel filter or fuel pump on and didn't replace the gasket.... not that I would know anything about that or anything
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Old 06-17-2009, 07:40 PM   #13
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Quote:
Originally Posted by KW_Scoob View Post
I made a quick blog post with pictures of the problem here:
http://drewstechnotes.blogspot.com/2...oblem-fix.html
This was the same thing that happen to me.Found it and fix the problem
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Old 06-09-2010, 12:40 PM   #14
graphicsman
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i put a new hose on mine that was longer than the original, can that maybe be throwing the code? (new, longer hose where the blue t is)
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Old 06-09-2010, 02:38 PM   #15
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Quote:
Originally Posted by graphicsman View Post
i put a new hose on mine that was longer than the original, can that maybe be throwing the code? (new, longer hose where the blue t is)
shouldnt have any affect on it, as long as you used vacuum hose.
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Old 06-13-2010, 12:10 AM   #16
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Yeah this code blows. I just had this code on an H6. A tech previously diagnosed a fuel pressure sensor and changed it. Somehow I magically got the come back. Well the tank had two pressure style sensors so I changed the other one.

Honestly it's a huge pain in the ass. The job paid .7 hours and I had at least an hour going over a few basic things. The problem is all the readings I was getting were correct and everything was functioning properly. It's not easy trying to locate the problem. I had two Sr master techs working with me on it who've been with subaru for a long time and have seen pretty much everything they have to offer. Unfortunately while in the shop the older lady that owned it died. Kind of sucks because I most likely will never know if that fixed the problem or not.
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Old 06-16-2010, 09:27 PM   #17
graphicsman
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I'm still badling this code, it sucks
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Old 06-17-2010, 10:15 AM   #18
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Quote:
Originally Posted by graphicsman View Post
I'm still badling this code, it sucks
Almost as much as your spelling.
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Old 06-17-2010, 08:39 PM   #19
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Quote:
Originally Posted by 05wrx09 View Post
Another culprit could be the rubber gasket seal thing on the fuel pump assembly housing...

I think that's the code that my WRX started throwing shortly after I bought it and the gasket was the problem. The dealer did inform me that it was possibly the fuel cap though.
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Old 06-23-2010, 08:02 PM   #20
graphicsman
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Quote:
Originally Posted by TFBHTMFSNE View Post
Almost as much as your spelling.
thats what you get when always on an iphone
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Old 07-17-2010, 12:40 AM   #21
code72chase
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Quote:
Originally Posted by KW_Scoob View Post
I guess I'm bringing this back from the dead but I just dealt with this issue after a Perrin turbo inlet install (only threw it tonight... a few days after the install!).

I made a quick blog post with pictures of the problem here:
http://drewstechnotes.blogspot.com/2...oblem-fix.html

Essentially the purge control host got disconnected and thus there was a "gross leak". Super easy fix, tricky little item to see and scary as hell when the code isn't in the repair manual.
+1 to another successful diagnosis. This was my issue too. Thank you!
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Old 08-03-2010, 01:38 PM   #22
ed10
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Quote:
Originally Posted by KW_Scoob View Post
I guess I'm bringing this back from the dead but I just dealt with this issue after a Perrin turbo inlet install (only threw it tonight... a few days after the install!).

I made a quick blog post with pictures of the problem here:
http://drewstechnotes.blogspot.com/2...oblem-fix.html

Essentially the purge control host got disconnected and thus there was a "gross leak". Super easy fix, tricky little item to see and scary as hell when the code isn't in the repair manual.
Ok I'm having the same issue and I see the blue nozzle but I noticed that it is T shaped....my question is should it have a hose plugged to all three ends???
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Old 08-05-2010, 06:24 PM   #23
ed10
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bump this...I need an answer!!!!
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Old 08-16-2010, 10:09 PM   #24
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Yeah, I have the same problem as well. I have no idea how to go about diagnosing this because the suggestions seem to be all over the car and in hard to reach areas.

I checked the blue nipple thing and that seemed to be hooked up okay (from what I can see, at least)
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Old 10-11-2010, 04:55 PM   #25
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Quote:
Originally Posted by ed10 View Post
Ok I'm having the same issue and I see the blue nozzle but I noticed that it is T shaped....my question is should it have a hose plugged to all three ends???
i got this code on my Fxt today, so i checked out the blog, and the blue connector is indeed a T-connector, there was a loose hose right next to it that came out of the intake manifold, so i connected it to the T-connector (the one mentioned above was already connected). we'll see if it throws another CEL. but YES, the blue connector is a T-connector.
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