P0456 Code
- Knightryda
- 2GN Member
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P0456 Code
Okay so the code is very vague. I guess my question is, Could this also be vacuum leak? And what is the probability of the problem being a faulty gas cap?
I had this code few weeks back
i replaced the gas cap and it still was kicking around
bough a new muffler, threw that on and have not had the code since....
been two weeks of running the car 4x a day to see if it comes back
as it needs to go for etest..
so far so good no issues yet!
Not saying go out and replace your muffler
but thats what i think cleared it up for me!
i replaced the gas cap and it still was kicking around
bough a new muffler, threw that on and have not had the code since....
been two weeks of running the car 4x a day to see if it comes back
as it needs to go for etest..
so far so good no issues yet!
Not saying go out and replace your muffler
but thats what i think cleared it up for me!
- RobsProjectSOHC
- 2012 Gold Contributor
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- Location: NY
I have this code with a couple of others. You could look at your vacuum lines for cracks, but i read its mostly gas cap, o2 sensor, exhaust.
Well, tomorrow im replaying the 02 (downstream) with an all new SS exhaust, headers to the muffler.
if it doesnt fix then idk
Well, tomorrow im replaying the 02 (downstream) with an all new SS exhaust, headers to the muffler.
if it doesnt fix then idk
Project 003. Just building a Daily Driver with some upgrades.
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Official "I'm gonna drive my Neon until it dies Club" Member #119
For Sale Thread | CarDomain | FeedBack
Official "I'm gonna drive my Neon until it dies Club" Member #119
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Basically it is a small leak detected. You have to check every tube/hose on the evap system, including the filler neck, and anything attached to the fuel tank. Most times it is the hoses at the nlvd or the charcoal canister.
It can be either an easy fix, or a small nightmare tracking it down.
Replacing the muffler, might have bumped something near the charcoal canister/pump, and temporarily sealed the leak.
viewtopic.php?t=28793
It can be either an easy fix, or a small nightmare tracking it down.
Replacing the muffler, might have bumped something near the charcoal canister/pump, and temporarily sealed the leak.
viewtopic.php?t=28793
Bill
1999 neon coupe 2.4 swap
2021 Forester
2000 Neon MTX swap with '02 R/T PCMOlha Koba, a psychologist in Kyiv, said that “anger and hate in this situation is a normal reaction and important to validate.” But it is important to channel it into something useful, she said, such as making incendiary bombs out of empty bottles.
1999 neon coupe 2.4 swap
2021 Forester
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Actually running it that hard, the manifold vacuum is probably much lower.
The LDP basically pulls a vacuum on the system. How well that vacuum holds is what it is monitoring. The way you drive likely has nothing to do with it. Other than how inertia is pulling on the various hoses and other components...
The LDP basically pulls a vacuum on the system. How well that vacuum holds is what it is monitoring. The way you drive likely has nothing to do with it. Other than how inertia is pulling on the various hoses and other components...
Bill
1999 neon coupe 2.4 swap
2021 Forester
2000 Neon MTX swap with '02 R/T PCMOlha Koba, a psychologist in Kyiv, said that “anger and hate in this situation is a normal reaction and important to validate.” But it is important to channel it into something useful, she said, such as making incendiary bombs out of empty bottles.
1999 neon coupe 2.4 swap
2021 Forester
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- Location: Ashland Ohio
I don't see why it would. It has nothing to do with engine management.
It is more of an environmental protection thing. They don't want un burned hydrocarbons escaping into the air. The vacuum is how it monitors that the fuel tank is sealed.
Give them time, they'll have o-rings in the filler neck to seal the fuel nozzle while you fill up.
It is more of an environmental protection thing. They don't want un burned hydrocarbons escaping into the air. The vacuum is how it monitors that the fuel tank is sealed.
Give them time, they'll have o-rings in the filler neck to seal the fuel nozzle while you fill up.
Bill
1999 neon coupe 2.4 swap
2021 Forester
2000 Neon MTX swap with '02 R/T PCMOlha Koba, a psychologist in Kyiv, said that “anger and hate in this situation is a normal reaction and important to validate.” But it is important to channel it into something useful, she said, such as making incendiary bombs out of empty bottles.
1999 neon coupe 2.4 swap
2021 Forester
Well I was driving with quarter tank of gas or lower. Filled up and the code/light went away...gcretro wrote:on my 04 neon se, this p0456 shows up if I drive hard. Last week I red lined the motor touching 6 to 7K rpm couple of times... Next day morning, greeted with P0456.
I suppose at higher revs, there is more vacuum? causing a greater chance of a leak?
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