p0449 back again

[Most Hated]

Awhile back I got the p0449 code on my 07 tahoe. I replaced the vent solenoid and cleared the code. It immediately came back. I ended up taking it to the dealer. They found a broken and corroded wire and repaired it. The code went away. However, a couple days ago the light turned back on. P0449 again. I pulled my receipt from the dealer and in the notes section the technician said the repair was made in the #1310 circuit at the C300 connector located at the left side underbody. I found a little info about the connector stating that it was located in front of the fuel tank near the brake module. I think I found the connector but was wondering if anyone else had any info on this connector or a picture of it. Also, does anyone know the wire colors for the vent solenoid at this connector or the pin numbers on the deutch connector? Thanks

 

[jz57]

When P0449 comes on, you should replace both vent valve and purge valve.

 

[Most Hated]

Its not the vent solenoid or purge solenoid. They both checked out fine, There was a short in the negative wire from the ECM to the c300 connector. Repaired the short and light is off.