Help! Blowing Codes

yellowstang6r · March 25th, 2008, 02:54 PM

My car's "Check Engine" light has been on for a few months and I decided to get it checked out. The codes it was giving were

P0442
P0401

Please help me out and let me know what these mean and what might have caused them. The light came on about 1 month after my intake was put on and the only other modification i have is a Flowmaster dual cat-back exhaust. So please let me know what to do. Thanks!

GreenFaleen · March 25th, 2008, 03:01 PM

your gas cap is loose

yellowstang6r · March 25th, 2008, 03:30 PM

Originally Posted by GreenFaleen

your gas cap is loose

My gas cap??? Hmmm, the guy said something about flow insufficiency and shit. My cap is tight tho.

yellowstang6r · March 26th, 2008, 09:22 AM

Anyone have anymore ideas?

shadow5403 · March 26th, 2008, 10:04 AM

P0401 - Insufficient EGR Flow.
P0442 - Leak in Evaporative System Detected.

Check for a possible vacuum leak, and check your EVAP system for possible leaks.

Triple A · March 26th, 2008, 12:23 PM

who names their kid "codes"?

shadow5403 · March 26th, 2008, 12:24 PM

Originally Posted by skatenc56

who names their kid "codes"?

/fail

crashnebula · March 26th, 2008, 12:34 PM

Originally Posted by skatenc56

who names their kid "codes"?

/fail big

GreenFaleen · March 26th, 2008, 02:43 PM

442 is usually your gas cap being bad, it will throw an egr code, make sure the cap is good, and seals right, if thats not it, replace the EGR pressure sensor, if thats not it replace the EGR valve itself, if thats not it replace the EGR vacuum solenoid

crashnebula · March 26th, 2008, 02:53 PM

and if thats not it then you just wasted alot of money and you need to take it all back

yellowstang6r · April 7th, 2008, 11:44 AM

Originally Posted by GreenFaleen

442 is usually your gas cap being bad, it will throw an egr code, make sure the cap is good, and seals right, if thats not it, replace the EGR pressure sensor, if thats not it replace the EGR valve itself, if thats not it replace the EGR vacuum solenoid

How much will this cost? What about the other code?

shadow5403 · April 7th, 2008, 11:47 AM

i already defined what both codes mean, and gave you a solution.

yellowstang6r · April 7th, 2008, 08:27 PM

Originally Posted by shadow5403

i already defined what both codes mean, and gave you a solution.

What is the EVAP system and where should i check?

yellowstang6r · April 22nd, 2008, 02:26 PM

bump

help

GreenFaleen · April 22nd, 2008, 02:31 PM

first off replace your gas cap, its 5 bucks and yours could leak,
reset the code by undoing the negative terminal of your battery for 15 mins,
drive if it comes back get the EGR pressure sensor its about 60 bucks and undo the battery again and drive if it still comes back (which I doubt since EGR code on a FORD is normally the pressure sensor) get a new EGR valve about 120 bucks and do the battery reset. If this still doesnt fix it get a new vacuum soleniod will run about 50 bucks. If this doesnt fix it you have a vacuum problem and need to go to a mechanic. Also when you get a new gas cap get a new PCV valve and replace that as well

yellowstang6r · April 22nd, 2008, 02:39 PM

Originally Posted by GreenFaleen

first off replace your gas cap, its 5 bucks and yours could leak,
reset the code by undoing the negative terminal of your battery for 15 mins,
drive if it comes back get the EGR pressure sensor its about 60 bucks and undo the battery again and drive if it still comes back (which I doubt since EGR code on a FORD is normally the pressure sensor) get a new EGR valve about 120 bucks and do the battery reset. If this still doesnt fix it get a new vacuum soleniod will run about 50 bucks. If this doesnt fix it you have a vacuum problem and need to go to a mechanic. Also when you get a new gas cap get a new PCV valve and replace that as well

There is a slight leak of gas, but only after i fill it up. That lasts for about an hour at a slow rate, possibly coming out of the tube connecting the gas cap and gas tank. Would this do it? What is the PCV valve and do i need a special one or universal?

GreenFaleen · April 22nd, 2008, 02:40 PM

Originally Posted by yellowstang6r

There is a slight leak of gas, but only after i fill it up. That lasts for about an hour at a slow rate, possibly coming out of the tube connecting the gas cap and gas tank. Would this do it? What is the PCV valve and do i need a special one or universal?

Uhh its the gas leak man, get that fixed thats your problem

yellowstang6r · April 22nd, 2008, 02:44 PM

Originally Posted by GreenFaleen

Uhh its the gas leak man, get that fixed thats your problem

So would i need to do any of the other stuff u recommended then? If not, how to fix the leak? Would this account for the other code as well or only the egr one?

GreenFaleen · April 22nd, 2008, 02:58 PM

Originally Posted by yellowstang6r

So would i need to do any of the other stuff u recommended then? If not, how to fix the leak? Would this account for the other code as well or only the egr one?

Nope all you need to do is fix the leak and it will fix both codes. What is happening is fuel vapors that should be in the EGR system are being let out through the leak so your getting insufficient flow and the leak code.

To fix it find the leak and replace whats leaking. If it is the filler hose they sale it at autozone and a shop will put it in for about 50-80 bucks depending on my hard of a swap it is

wadepetersen · April 22nd, 2008, 03:00 PM

will the gas cap fix both or just the P0442 - Leak in Evaporative System Detected. code

March 25th, 2008, 02:54 PM	#1
yellowstang6r Enthusiast 2001 Mustang V6 never ran it Join Date: Feb 2008 Location: Selinsgrove, PA Posts: 701 iTrader: 2 reviews	Help! Blowing Codes My car's "Check Engine" light has been on for a few months and I decided to get it checked out. The codes it was giving were P0442 P0401 Please help me out and let me know what these mean and what might have caused them. The light came on about 1 month after my intake was put on and the only other modification i have is a Flowmaster dual cat-back exhaust. So please let me know what to do. Thanks!

March 25th, 2008, 03:01 PM	#2
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,906 Blog Entries: 2 iTrader: 1 reviews	your gas cap is loose __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

March 26th, 2008, 10:04 AM	#5
shadow5403 Hardcore Enthusiast Join Date: Oct 2007 Location: PA Posts: 2,041 iTrader: 0 reviews	P0401 - Insufficient EGR Flow. P0442 - Leak in Evaporative System Detected. Check for a possible vacuum leak, and check your EVAP system for possible leaks. __________________

March 26th, 2008, 02:43 PM	#9
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,906 Blog Entries: 2 iTrader: 1 reviews	442 is usually your gas cap being bad, it will throw an egr code, make sure the cap is good, and seals right, if thats not it, replace the EGR pressure sensor, if thats not it replace the EGR valve itself, if thats not it replace the EGR vacuum solenoid __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

March 26th, 2008, 02:53 PM	#10
crashnebula Regular 2000 Mustang v-6 Join Date: Mar 2007 Location: Texas Posts: 188 iTrader: 0 reviews	and if thats not it then you just wasted alot of money and you need to take it all back __________________ 2000 V-6 Coupe Mustang, 17 inch rims, custom hood, exhaust is done!!

March 26th, 2008, 09:22 AM	#4
yellowstang6r Enthusiast 2001 Mustang V6 never ran it Join Date: Feb 2008 Location: Selinsgrove, PA Posts: 701 iTrader: 2 reviews	Anyone have anymore ideas?

March 26th, 2008, 12:23 PM	#6
Triple A Shake Me Like A Monkey Join Date: Aug 2007 Posts: 3,010 iTrader: 1 reviews	who names their kid "codes"?

April 7th, 2008, 11:47 AM	#12
shadow5403 Hardcore Enthusiast Join Date: Oct 2007 Location: PA Posts: 2,041 iTrader: 0 reviews	i already defined what both codes mean, and gave you a solution. __________________

April 22nd, 2008, 02:26 PM	#14
yellowstang6r Enthusiast 2001 Mustang V6 never ran it Join Date: Feb 2008 Location: Selinsgrove, PA Posts: 701 iTrader: 2 reviews	bump help

April 22nd, 2008, 02:31 PM	#15
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,906 Blog Entries: 2 iTrader: 1 reviews	first off replace your gas cap, its 5 bucks and yours could leak, reset the code by undoing the negative terminal of your battery for 15 mins, drive if it comes back get the EGR pressure sensor its about 60 bucks and undo the battery again and drive if it still comes back (which I doubt since EGR code on a FORD is normally the pressure sensor) get a new EGR valve about 120 bucks and do the battery reset. If this still doesnt fix it get a new vacuum soleniod will run about 50 bucks. If this doesnt fix it you have a vacuum problem and need to go to a mechanic. Also when you get a new gas cap get a new PCV valve and replace that as well __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

April 22nd, 2008, 03:00 PM	#20
wadepetersen Regular Join Date: May 2007 Posts: 369 iTrader: 0 reviews	will the gas cap fix both or just the P0442 - Leak in Evaporative System Detected. code

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