P0456, then P0442 - Second Generation Nissan Xterra Forums (2005+)
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post #1 of 15 (permalink) Old 06-20-2019, 03:17 PM Thread Starter
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P0456, then P0442

Had the SES light on this morning when I started the X. I scanned the code and it came up P0456, small EVAP leak.

I didn't see a thread here dedicated to this code, but poking around in various threads points to a gas cap problem. I'm hoping that's right, I already know where the gas cap is and how to get it off. I did have a Loose Gas Cap come up on the odometer display about a month ago.

I cleared the code this morning, light didn't come back on for the commute, but it's still stored. My first try on keeping the code from coming back is applying a very small amount of grease on the filler neck where the gas cap rubber seal seats.

We shall see...
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Last edited by Longboardr; 06-21-2019 at 09:26 AM.
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post #2 of 15 (permalink) Old 06-20-2019, 03:21 PM
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Quote:
Originally Posted by Longboardr View Post
Had the SES light on this morning when I started the X. I scanned the code and it came up P0456, small EVAP leak.



I didn't see a thread here dedicated to this code, but poking around in various threads points to a gas cap problem. I'm hoping that's right, I already know where the gas cap is and how to get it off. I did have a Loose Gas Cap come up on the odometer display about a month ago.



I cleared the code this morning, light didn't come back on for the commute, but it's still stored. My first try on keeping the code from coming back is applying a very small amount of grease on the filler neck where the gas cap rubber seal seats.



We shall see...
Totes should make a how-to for those that may not be able to locate their gas cap.

Let's hope it goes away. Lol.
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post #3 of 15 (permalink) Old 06-20-2019, 03:26 PM Thread Starter
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Originally Posted by Adam12SD View Post
Totes should make a how-to for those that may not be able to locate their gas cap.

Let's hope it goes away. Lol.
I used to car pool in high school with a girl that didn't know how to pump her own gas. C'mon, we're not that close to Jersey!
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post #4 of 15 (permalink) Old 06-20-2019, 06:59 PM
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Oh jeez... I've heard stories about people driving on the freeway with the nozzles still in their fill tubes, dragging hoses. Lol. It's a scary world out there...

Or a wife texting her husband "hey, the 710 cap is off... Is that important?"
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post #5 of 15 (permalink) Old 06-21-2019, 01:15 AM
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If you ever need a reolacement 710 cap these guys have you covered.
http://kalecoauto.com/index.php?main...8irjiCICYuV7k0

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post #6 of 15 (permalink) Old 06-21-2019, 09:33 AM Thread Starter
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The SES light came back on, this time it was a P0442, so grease didn't help.

Next step was use a random gas cap I happened to find a while ago. That didn't help, a P0456 came back again this morning.

I'll be buying a cap on general principle, but I'm expecting I'll be digging deeper after putting a new gas cap on.

Carpe lardum

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post #7 of 15 (permalink) Old 06-21-2019, 09:54 AM
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For what it's worth, my evap related codes haven't come back in 4 years after the following steps:
  1. Replaced gas cap
  2. Replaced clogged vent solenoid (on the can)
  3. Replaced ok-looking ? solenoid (on the engine intake)

I did not have to change out the pressure sensor or any tubing and the charcoal in my can was fine. Sorry I can't remember the exact name of the front solenoid, it's in the FSM though and wasn't very expensive if I recall.

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post #8 of 15 (permalink) Old 06-21-2019, 10:47 AM
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You've probably seen this thread, but if not it may have some useful info:
https://www.thenewx.org/forum/15-how...-%245-pbr.html

Also see this service bulletin (although it references older model years, could still apply):
http://ww2.justanswer.com/uploads/ba...TB07-058a1.pdf
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post #9 of 15 (permalink) Old 06-21-2019, 11:30 AM Thread Starter
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Thanks for the leads guys. 29er's #2 is where I figured I'd be headed next week. I ordered a cap with the local stealership, comes in tomorrow.

Semi-pro tip, if you get the part up on an online source you can haggle price with the parts department. They wanted $35 for the cap, I said I'm looking at it online for $23.08 and they agreed to match the price. Other times they've not matched the price but lowered their asking price. Works great if shipping cost or time waiting for parts is a deal breaker for an online purchase.
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post #10 of 15 (permalink) Old 06-21-2019, 12:13 PM
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Keep posting how this thing progresses...I'm interested over here. Thanks @Longboardr

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