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error code P0042

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Old Jan 16, 2016 | 06:51 PM
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Default error code P0042

I have been smelling gas when I fill up my 04 vette.
Last night I got error code P0442: Evap Emission System small leak.
Would bad gas cap cause this code?
I bought this car used in October with 24K miles on it and it has done this since I bought it.
I have also had problems with the fuel gage going back and forth from F to E. I put the GM additive in it and that took care of the problem until last night when the error code showed up.
any suggestions?
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Old Jan 16, 2016 | 08:16 PM
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2004 Chevrolet Corvette made with VIN numbers that fall in between
VIN 45110258 to 45125500 range and you smell fuel or if fuel is leaking after full fill up due to defective crossover connectors.

This could very possibly be your problem. Unfortunately, the recall on these fell within 10 years of the original date your vehicle was placed in service or 100,000 miles, which ever comes first.
Your mileage is low but you car is 14 yrs old.
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Old Jan 17, 2016 | 07:34 AM
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In hopes it is not the cross over pipe, my daughter's Jeep has this code a lot. I usually find a rubber hose in the system with a crack in it. Trace the line from the driver's side front of the intake all the way back to the canister in the rear and look for any cracks. Any attached rubber hoses to this system should be checked. Don't overlook the smallest of cracks, some of the ones I found on the Jeep I never thought would cause a code but it did.

Make sure to check the cross over pipe first, that could be a major issue if that is the problem.
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Old Jan 17, 2016 | 09:45 AM
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Originally Posted by vettenuts
In hopes it is not the cross over pipe, my daughter's Jeep has this code a lot. I usually find a rubber hose in the system with a crack in it. Trace the line from the driver's side front of the intake all the way back to the canister in the rear and look for any cracks. Any attached rubber hoses to this system should be checked. Don't overlook the smallest of cracks, some of the ones I found on the Jeep I never thought would cause a code but it did.

Make sure to check the cross over pipe first, that could be a major issue if that is the problem.
Vettenuts, how do I check the cross over pipe and where is the intake located at and the rear canister that you mention?
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Old Jan 17, 2016 | 09:48 AM
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Originally Posted by 8VETTE7
Could be the gas cap. Cheap enough to replace at around $15.

Is the VIN of the car in the range:

45110258 through 45125500 built Oct 8, 2003 through March 18, 2004

???


If so the problem may well be an expensive one to repair.


http://forums.corvetteforum.com/albu...ictureid=42084
8VETTE7 is there a way to check to see if the mod was done?
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Old Jan 17, 2016 | 04:27 PM
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Originally Posted by 8VETTE7
Is your VIN within the range????

The cars in the VIN range received a special policy gas tank warranty that was good for 10 years or 100K miles which ever came first. If the tank failed in that time/miles frame, GM picked up the tab for replacement of the tank, the only correction possible since the crossover pipe to the passenger side tank attaches there. You are outside both so GM is not going to help in any way. Others have tried and GM turns their back on a 11 or 12 year old car.

If the car had been serviced under the special policy a new tank would have been installed and there would be no further problem. Only way to know if the bung on the drivers side tank is the problem is to look. Not easy to see even when up in the air. As you can see from the pic in the link the bung cracks on the bottom of its attachment to the tank. It may be visible with the car on a lift from under the car. Can't say for certain. A new tank installed by a dealer is going to cost between $2000 and $3000. Same tanks are used on all the C6's and now all the C7's. My own car is in that VIN range and if it fails I will install a used tank from a C6. DO NOT get a used C5 tank as you have know way to know if you are getting a tank from the suspect VIN range.

There are video's on the Internet of how to change the tank yourself if you are mechanically inclined and plan to take this on yourself.
Yes, my vette is within that range. Can sniffing indictate if the leak is from there?
Also, where is the intake and the canister that Vettenuts is referencing.
I can't find diagrams for that car to get a visual reference.
Have you had any problems with your car?
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Old Jan 17, 2016 | 06:29 PM
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Originally Posted by conestoga
Yes, my vette is within that range. Can sniffing indictate if the leak is from there?
Also, where is the intake and the canister that Vettenuts is referencing.
I can't find diagrams for that car to get a visual reference.
Have you had any problems with your car?

https://www.google.com/search?q=c5+c..._AUIBigA&dpr=1
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Old Jan 18, 2016 | 10:42 AM
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All the above guidance thus far is on the money. If you remove the driver's side coil cover, you will see a some hard plastic lines connected from the intake manifold in the front to a solenoid valve with a green cap (at least mines green) and then another hard line that connects at the firewall. That is the EVAP line. Trace that line and look for cracks. Also check the vent line at the fuel fill as well. All the hoses connected to the tanks must be checked for small cracks. The 0442 code is a little tougher to find because the leak can be tiny. The small leak can also be the gas cap. Some of the leaks in my daughter's Jeep were hard to find because I would find a tiny little crack in a rubber line and think that can't be the cause but it typically was. Also, the hard plastic lines have a built in seal (almost like an o-ring) so if you suspect one of those, replace it temporarily with rubber hose and see if the code goes away. If you go to the dealer, they will do a smoke test and find the leak but that can be expensive depending on the amount of time they spend on the problem

I would be most concerned with the cross-over pipe. If you smell fuel near the rear of the car I would first make sure it is parked outside away from the house and get that attended to ASAP. If you aren't smelling fuel, then trace the EVAP lines and look for cracks or other issues.

Last edited by vettenuts; Jan 18, 2016 at 10:47 AM.
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Old Jan 18, 2016 | 11:03 AM
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Originally Posted by 8VETTE7

Not sure what you mean by "sniffing" to find a leak. Can you explain?
There are test instruments that "sniff" for hydrocarbons that's my guess what he's talking about
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