Catalytic Converter dead AGAIN
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From: Wisconsin
You don't have a location in your header, so I don't know if you live where they salt the roads. Corroded stuff under the car is pretty common around my area, so I wouldn't be surprised if the junkyard part had a stuck valve somewhere.
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Joined: May 2006
Posts: 18,398
From: Wisconsin
The radiator is conceptually pretty easy. Couple hoses, couple fan wires, & a couple mounting bolts. (Easy for me to say, huh?)
Automatic transmission? If so, there's a couple ATF-cooler hoses & an oily mess when you disconnect them.
Automatic transmission? If so, there's a couple ATF-cooler hoses & an oily mess when you disconnect them.
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Anyway, as far as the P1457 goes you may be right that its just a bad part. And yeah they salt the roads here in the winter, a fairly good bit.. I will test it out tomorrow and see if all is good with the vent shut valve.. just run a jumper cable to the vent shut valve's harness right??
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Catalytic converters failing is rarely a reality........no mechanical parts...purely a chemical reaction.
They can crack from overheating, rot through from excess moisture or clog from excess fuel. They work by a chemical reaction and that never stops.
"http://blog.theautopartsshop.com/learn-how-catalytic-converter-works/"
What does fail is another component that will cause an excess fuel condition causing the cat to clog or overheat which can crack the internal brick, making it necessary to change the cat. Excess vibration, running through a large puddle when the cat is really hot....either can also cause a cat to crack.
In this case, if the purge valve is bad, it will eventually cause the new cat to fail. This needs to be corrected ASAP.
"http://www.theautopartsshop.com/auto+car-usa+parts/honda+accord+vapor-canister-purge-valve.html"
The groan may be normal for this type of cat
They can crack from overheating, rot through from excess moisture or clog from excess fuel. They work by a chemical reaction and that never stops.
"http://blog.theautopartsshop.com/learn-how-catalytic-converter-works/"
What does fail is another component that will cause an excess fuel condition causing the cat to clog or overheat which can crack the internal brick, making it necessary to change the cat. Excess vibration, running through a large puddle when the cat is really hot....either can also cause a cat to crack.
In this case, if the purge valve is bad, it will eventually cause the new cat to fail. This needs to be corrected ASAP.
"http://www.theautopartsshop.com/auto+car-usa+parts/honda+accord+vapor-canister-purge-valve.html"
The groan may be normal for this type of cat
Last edited by JimBlake; May 28, 2012 at 10:11 PM. Reason: links
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Joined: May 2006
Posts: 18,398
From: Wisconsin
I'm not sure I see an EVAP problem causing a cat to fail. I don't think the EVAP system can deliver enough extra fuel to the system to overheat the catalyst. It should be within the capacity of the primary O2 sensor to adjust for it.
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I bought a purge valve, just in case, to replace this one and see if that helps..
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Joined: May 2012
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Hi... just checking... do you smell any gasoline fumes? If you can raise your car, try to sniff around near the charcoal canister and the purge valve/ 2-way valve. A P1457 code is EVAP leak. That could mean loose gas cap to anything around the EVAP system including cracked hoses.Cracked hoses or defective valves can cause vacuum leaks and mess with the sensors.
I had what i thought was a CAT converter problem because the engine light came on saying "Catalytic effiency below threshold". But in the meantime, I smelled fuel and thought I had a fuel line leak. But it turned out that the smell was coming from the near the 2-way valve and purge valve. I replaced those 2 items along with the pressure sensor and all connecting hoses. Replacing those 3 things stopped the fuel smell and also the check engine light does not come on anymore.
What i suspected is that one of the valves was stuck open causing more fumes to go into the engine and making it run rich, and causing the O2 sensor think the CAT wasnt doing its job.
If you dont smell fuel, try checking for vacuum leaks (near the gas tank) because the P1457 code generally indicates that the fuel tank is not holding pressure, hence loose gas cap, or cracked hoses, etc...
Good luck!
I had what i thought was a CAT converter problem because the engine light came on saying "Catalytic effiency below threshold". But in the meantime, I smelled fuel and thought I had a fuel line leak. But it turned out that the smell was coming from the near the 2-way valve and purge valve. I replaced those 2 items along with the pressure sensor and all connecting hoses. Replacing those 3 things stopped the fuel smell and also the check engine light does not come on anymore.
What i suspected is that one of the valves was stuck open causing more fumes to go into the engine and making it run rich, and causing the O2 sensor think the CAT wasnt doing its job.
If you dont smell fuel, try checking for vacuum leaks (near the gas tank) because the P1457 code generally indicates that the fuel tank is not holding pressure, hence loose gas cap, or cracked hoses, etc...
Good luck!
Thread Starter
|
Member
Joined: May 2010
Posts: 210
Hi... just checking... do you smell any gasoline fumes? If you can raise your car, try to sniff around near the charcoal canister and the purge valve/ 2-way valve. A P1457 code is EVAP leak. That could mean loose gas cap to anything around the EVAP system including cracked hoses.Cracked hoses or defective valves can cause vacuum leaks and mess with the sensors.
I had what i thought was a CAT converter problem because the engine light came on saying "Catalytic effiency below threshold". But in the meantime, I smelled fuel and thought I had a fuel line leak. But it turned out that the smell was coming from the near the 2-way valve and purge valve. I replaced those 2 items along with the pressure sensor and all connecting hoses. Replacing those 3 things stopped the fuel smell and also the check engine light does not come on anymore.
What i suspected is that one of the valves was stuck open causing more fumes to go into the engine and making it run rich, and causing the O2 sensor think the CAT wasnt doing its job.
If you dont smell fuel, try checking for vacuum leaks (near the gas tank) because the P1457 code generally indicates that the fuel tank is not holding pressure, hence loose gas cap, or cracked hoses, etc...
Good luck!
I had what i thought was a CAT converter problem because the engine light came on saying "Catalytic effiency below threshold". But in the meantime, I smelled fuel and thought I had a fuel line leak. But it turned out that the smell was coming from the near the 2-way valve and purge valve. I replaced those 2 items along with the pressure sensor and all connecting hoses. Replacing those 3 things stopped the fuel smell and also the check engine light does not come on anymore.
What i suspected is that one of the valves was stuck open causing more fumes to go into the engine and making it run rich, and causing the O2 sensor think the CAT wasnt doing its job.
If you dont smell fuel, try checking for vacuum leaks (near the gas tank) because the P1457 code generally indicates that the fuel tank is not holding pressure, hence loose gas cap, or cracked hoses, etc...
Good luck!
Just want to say to all of y'all on the forum you guys have been great with all the help I've gotten. You know who y'all are.
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