Scan code P0443
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 26
Likes: 0
From: Folsom California
Scan code P0443
Got the check engine light on my '01(non Z06) and my scanner read P0443-"control system purge valve fault". 
My local parts house(AutoZone) offered me some bogus explanations. Could someone with experience walk me through this one? I am what might be called an "advanced amateur" mechanic, meaning I have built a number of small blocks BUT......not up to standards with modern technology. Thanks in advance from a brand new member. 
My local parts house(AutoZone) offered me some bogus explanations. Could someone with experience walk me through this one? I am what might be called an "advanced amateur" mechanic, meaning I have built a number of small blocks BUT......not up to standards with modern technology. Thanks in advance from a brand new member.
Drifting
Joined: May 2002
Posts: 1,607
Likes: 1
From: San Francisco CA
Most likely, the code stems from a bad purge valve or blown fuse. I believe the fuse is #16 in the fuse box next to the battery but I’m not sure, as I don’t have my shop manual in front of me.
If the fuse is good, then it’s most likely a bad purge valve. If you remove the drivers side fuel rail cover and look in the area of the #3 injector you will see that the purge valve has an electrical connector that goes to the harness and one tube going to the front toward the throttle body and one tube going towards the back of the engine. Check the connections but barring an unlikely short or open the valve is must likely the culprit
I wish I could be sure of the fuse# but this should head you in the right direction
If the fuse is good, then it’s most likely a bad purge valve. If you remove the drivers side fuel rail cover and look in the area of the #3 injector you will see that the purge valve has an electrical connector that goes to the harness and one tube going to the front toward the throttle body and one tube going towards the back of the engine. Check the connections but barring an unlikely short or open the valve is must likely the culprit
I wish I could be sure of the fuse# but this should head you in the right direction
Racer
Joined: Aug 2005
Posts: 388
Likes: 6
Originally Posted by SFVetteman
Most likely, the code stems from a bad purge valve or blown fuse. I believe the fuse is #16 in the fuse box next to the battery but I’m not sure, as I don’t have my shop manual in front of me.
If the fuse is good, then it’s most likely a bad purge valve. If you remove the drivers side fuel rail cover and look in the area of the #3 injector you will see that the purge valve has an electrical connector that goes to the harness and one tube going to the front toward the throttle body and one tube going towards the back of the engine. Check the connections but barring an unlikely short or open the valve is must likely the culprit
I wish I could be sure of the fuse# but this should head you in the right direction
If the fuse is good, then it’s most likely a bad purge valve. If you remove the drivers side fuel rail cover and look in the area of the #3 injector you will see that the purge valve has an electrical connector that goes to the harness and one tube going to the front toward the throttle body and one tube going towards the back of the engine. Check the connections but barring an unlikely short or open the valve is must likely the culprit
I wish I could be sure of the fuse# but this should head you in the right direction
Just checked.....it is 19.
Thanks. I am on my way to my garage right this minute. This site rocks.
