I just got the p0138 light this morning when i started up my car...it was cold and rainy last night...so the remedy is just replacing the rear o2? Even if i have no cat?...i got the car reflashedfor the CEL before...

 

I just did the cheap method this weekend by creating the extension out of the non-fouler. (It didn't work for me). However I noticed alot more of moisture where the rear O2 sensor goes.

2 Questions: My bung is located on the 3 O'clock position, could possibly moisture drown the Oxygen sensor, thus sending the CEL?

When I say moisture, I mean water type liquid that appears to drip from the exhaust when you turn on a vehicle early in the morning?

This might sound like ****(so I'm sorry): But when I put my finger in the bung my finger is caked in water(*shakes head). Can somebody school me why so much water resides? where heat fumes exit?