Stalling when cold

[billb]

I'm still fighting an intermittent problem. The car will sometimes stall when it is cold. It will start up fine, run a little while then quit. It starts again and may stall again. After about 2 miles of driving (with your fingers crossed), it's fine.

I finally got a CEL. It's a code 37 for the left side O2 sensor. Does anyone know if this could cause stalling? I thought it would just affect the emissions. I am thinking that I have just discovered a new problem and replacing the O2 sensor won't fix my real problem. Thanks for any opinions.