Smoke!!!

[DiscoDriver]

I just replaced both upstream O2 sensors on my DII, initally because of a P0150 code indicating a bad Bank B senor. No more problems there, but within 20 miles I got a P0130 code indicating a possibly malfunctioning Bank A senosr. Luckily I bought two sensors so I immediately replaced the upstream Bank A sensor. Now, 800 miles later, the Bank A upstream is again throwing code P0130 which is most likely a bad sensor or bad connection. I opened the hood this AM to check it out and noticed wisps of white smoke rising up from near the upstream sensor/catalytic converter area.

I'm not loosing coolant, and there was no coolant or oil smell. I'm wonder if I may have a leaking transmission cooler line and this is what's "smoking", and perhaps mucking with a brand new O2 sensor?

Thanks,

Mark

 

[joey]

If it has any oil or fluid (other than just water) leaking on to the O2 sensor, this can cause it to go bad... But if you not getting a smell, check to make sure the drain lines for the A/C unit are clear and not causing the whitle smoke... One on each side of the transmission, looks like a small black ****** connected to a tube... if they are clogging, be careful it will get you covered in some nasty stuff.

 

[DiscoDriver]

Thanks Joey. I "thought" I didn't have a coolant leak but it turns out I do; from the head gasket right above the Bank A sensor! So it looks like time to prepare for replacing the head gaskets!!!