Codes 0445 and 0139

RODNEY SHROVE

MEMBER
2006 CHEVROLET TRAILBLAZER
3.6L
6 CYL
2WD
AUTOMATIC
106,000 MILES

I believe that these were the codes I was getting but can't remember. I do know that when I looked them up it was related to the perg valve.I was going to go buy a gun to hook up and test the pressure but now the traction control light comes on from time to time. Are these possibly related issues?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

The P0445 is related to an evap leak. (large leak). Make sure the fuel cap is on and tight. Also, a large leak is usually something you can find. Check for disconnected hoses under the hood as well as near the gas tank. If you look at pic 1, it shows the evap canister which is near the fuel tank under the vehicle. Locate it and confirm it isn't cracked and none of the hoses are disconnected, damaged, or split. The other code, P0139 is an O2 code. There is a good chance that the code will be fixed when the leak is repaired, so let's focus on those two things first.

Now for the traction control, it isn't related to the aforementioned codes. Chances are it is related to a faulty wheel speed sensor. I have a favor to ask. Could you start a new thread with the traction control issue. We are trying to keep the threads specific to one topic. I hope you understand.

https://www.2carpros.com/questions/new

If you are unable to find the leak, have the system smoke tested. Basically, smoke is injected into the system and where there is a problem, it will leak out and be seen.

Let me know if I can help.

Joe

Image (Click to make bigger)