After few days I repaired my turbo exhaust manifold (It had a little crack), a check engine light appears, I scan it and found a P0170 error (Fuel trim mal function Back 1), also I have this freeze frame from the scanning:

Calc load % 17.6
Coolant F 183
ST FTRM1 % 16.3
LT FTMR1 % 12.4
Engine rpm 796


I think I have a bad O2 sensor... is this correct? maybe they damaged, when the mechanic take down the turbo and manifold, to repair it.

If this correct, I have to change the O2 sensor...and I found this one on ebay:

http://cgi.ebay.com/ebaymotors/ws/eB...MEWA:IT&ih=015

Can I use it? the only thing is I have to weld the 4 wires... right?

I' m grateful for your help.

 

Anyone can help me?