EVAP Fault & Leak

dmb40 · 03-20-2007, 04:32 PM

I have a 2007 Prius. I dented the gas tank (off roading a bit) and got a few DTCs adn THE light stating that the tank EVAP Emission Control System Purge Flow Fault P0441 and EVAP Emission Control System Leak Large P0455. I cleared the codes thinking that I overpressurized the system as I dented the tank and had no problems for 500-1000 miles. THE light came on again after a large temp change overnight and once again this mornign after a large temp change with the same codes. My gas gauge works as it had and there are no punctures to the tank. The drivers side forward quarter of the tank is indented a bit. Any advice on what might be causing the DTC codes? I have a CAN OBDII scanner but no access to the expensive Toyota versions. Thanks!

**efusco** · 03-20-2007, 04:45 PM

Yikes, this is NOT something I'd sit around waiting to 'see what happens'. If anything happens it will not be anything good. Maybe the tank needs to be checked, even if no leak it could be weakened by the damage. There are multiple sensors inside the tank that are involved with reporting the fuel level (it's complex b/c of the internal bladder) and one of those could be damaged kicking off your codes.

Still, and I know it'll be costly, I think you should have it checked out right away for your own and your passenger's safety.

Bill Merchant · 03-20-2007, 07:06 PM

Here's a schematic of the 2006+ tank. Lots of things could have been damaged.

[attachmentid=6974]

dmb40 · 03-21-2007, 02:07 AM

<div class='quotetop'>QUOTE(Bill Merchant @ Mar 20 2007, 05:06 PM) [snapback]409262[/snapback]</div>

Quote:

Here's a schematic of the 2006+ tank. Lots of things could have been damaged.

[attachmentid=6974]
[/b]

Thank you Bill. I think I am going to continue to wait and see. One day soon I am going to try to find the top of the tank via the rear seats and look for obvious damage if any. I may have popped a diaphram in a pressure sensor squirted some fuel into a vapor only valve. I do not think there is obvious mechanical damage as everything except the EVAP surge system is working well. THer are no leaks or smells or fumes etc... For all I know at this time a hose popped off the purge system!

I will post my results!

03-20-2007, 04:45 PM	#2
efusco Troll Slayer Join Date: Nov 2003 Location: Nixa, MO Posts: 19,598 My Car: 2004 Prius Model: Package: #9 Thanks: 214 Thanked 870 Times in 505 Posts Friends: 47	Yikes, this is NOT something I'd sit around waiting to 'see what happens'. If anything happens it will not be anything good. Maybe the tank needs to be checked, even if no leak it could be weakened by the damage. There are multiple sensors inside the tank that are involved with reporting the fuel level (it's complex b/c of the internal bladder) and one of those could be damaged kicking off your codes. Still, and I know it'll be costly, I think you should have it checked out right away for your own and your passenger's safety. __________________ Evan E. Fusco, MD "It's a damn poor mind that can only think of one way to spell a word." -Andrew Jackson

03-20-2007, 07:06 PM	#3
Bill Merchant absit invidia Join Date: May 2005 Location: USA \| Oregon \| Portland area \| 97004 \| Posts: 4,096 My Car: 2007 Prius Model: Package: #5 Thanks: 20 Thanked 40 Times in 21 Posts Friends: 63	Here's a schematic of the 2006+ tank. Lots of things could have been damaged. [attachmentid=6974] Attached Thumbnails

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03-20-2007, 04:32 PM	#1
dmb40 Junior Member Join Date: Mar 2007 Posts: 16 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	I have a 2007 Prius. I dented the gas tank (off roading a bit) and got a few DTCs adn THE light stating that the tank EVAP Emission Control System Purge Flow Fault P0441 and EVAP Emission Control System Leak Large P0455. I cleared the codes thinking that I overpressurized the system as I dented the tank and had no problems for 500-1000 miles. THE light came on again after a large temp change overnight and once again this mornign after a large temp change with the same codes. My gas gauge works as it had and there are no punctures to the tank. The drivers side forward quarter of the tank is indented a bit. Any advice on what might be causing the DTC codes? I have a CAN OBDII scanner but no access to the expensive Toyota versions. Thanks!