P0445 Code - Chevrolet Forum - Chevy Enthusiasts Forums

P0445 Code


  Reply  
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

August 11th, 2011, 8:45 PM   #1  
P0445 Code

Hi
I have my check engine light and check gas cap warning coming on I had the code read and I got the a P0445 code I have tried an aftermarket gas cap and the gas cap off my 2008 silverado and the warnings keep coming. From what I have read it is the evap system problem but where do I start??

 
EinST's Avatar
CF Veteran

Join Date: Mar 2011
Posts: 1,706

August 12th, 2011, 1:07 PM   #2  
Welcome to the forum. P0445 is an EVAP purge control circuit malfunction. If there's a slight leak at the EVAP purge valve as a result, it can cause the "CHECK GAS CAP" warning as a secondary effect.

 
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

August 14th, 2011, 7:52 PM   #3  
thanks for your help I will start there that is located at the side of the fuel tank??

 
EinST's Avatar
CF Veteran

Join Date: Mar 2011
Posts: 1,706

August 14th, 2011, 8:14 PM   #4  
You're quite welcome. The EVAP purge valve is in the engine compartment. Mind, you either have one problem or two problems. It's your money but I hope you aren't going to throw parts at it.

 
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

August 15th, 2011, 7:31 PM   #5  
Thanks I will try to find it tomorrow, I looked once but I guess not hard enough I am going to check out the condition of the valve and lines and then decided weather to change parts or take it in to have it fixed

 
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

August 30th, 2011, 7:53 PM   #6  
Well I changed the purge valve and all the lines I can't find anything wrong but the light is still on, but the check gas cap light only comes on every few starts. Also I am not sure if this is related or not every once and a while it does not like to start you turn the key but it doesn't want to fire, shut it off and back on it fights a bit but it starts, any ideas???

Thanks

 
EinST's Avatar
CF Veteran

Join Date: Mar 2011
Posts: 1,706

August 30th, 2011, 10:05 PM   #7  
That's what I was afraid of. If the purge valve is new and you're still getting P0445 (are you?), then the fault is probably electrical, either in the wiring or ECM itself. In addition, it must be intermittently failing the EVAP leak test (actually leaking or FTP sensor fault?). As luck would have it, it's really not feasible to work on EVAP problems without a smoke machine and professional level scan tool. It looks like you'll have to take it in for service.

 
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

August 31st, 2011, 4:44 AM   #8  
That what I figured its like looking for a needle in a hay stack thanks for your help I'll let u know when I take it in what it was
Thanks

 
Papa Bear's Avatar
CF Senior Member

Join Date: Aug 2008
Posts: 381
Ontario, Canada

August 31st, 2011, 7:32 AM   #9  
What year, model and mileage is your vehicle? Are you the original owner?


Last edited by Papa Bear; August 31st, 2011 at 7:34 AM.
 
zx6rf7's Avatar
CF Beginner

Join Date: Aug 2011
Posts: 16

September 1st, 2011, 4:47 AM   #10  
Papa Bear its a 2006 Lt regular version with 125000 on it and I am the second owner it was a lease return

 
Tags
Search this Thread
Sponsors
Related Topics