O2 Sensor Color
Thread Starter
Drifting
Joined: May 2003
Posts: 1,328
Likes: 3
From: Las Vegas Nevada
O2 Sensor Color
I pulled one of my front sensors off, and was surprised to see it black and sooty - heavily carboned up.
Other sensors I have seen are usually a tan color.
I have no codes, and it runs fine except for the darn exhaust jingle.
Is this black appearance normal?
Thanks in advance
Other sensors I have seen are usually a tan color.
I have no codes, and it runs fine except for the darn exhaust jingle.
Is this black appearance normal?
Thanks in advance
916/795 rwhp C5R 412 YSI
Joined: May 2005
Posts: 287
Likes: 0
If your car is running fine and not throwing any codes, then I would not worry about the color. I've gone through many O2 sensors for other reasons and mine are always have a carbon/sooty color. Should they be? During (CL) closed loop operation it is normal for the O2 sensors to constantly switch between rich/lean conditions. That is how they are intended to operate. 
Thread Starter
Drifting
Joined: May 2003
Posts: 1,328
Likes: 3
From: Las Vegas Nevada
Originally Posted by c52k1vert
If your car is running fine and not throwing any codes, then I would not worry about the color. I've gone through many O2 sensors for other reasons and mine are always have a carbon/sooty color. Should they be? During (CL) closed loop operation it is normal for the O2 sensors to constantly switch between rich/lean conditions. That is how they are intended to operate.
