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bueller20
07-03-2014, 11:38 AM
Hi All,

I was investigating a P0138 code (faulty rear o2 sensor) and noticed this potential leak in the process. Any idea what it is? I have had no work done to the vehicle and I do everything myself to begin with so it is not lubricant.

Thanks for the help!

Cheers.

http://i59.tinypic.com/20zp7nt.jpg