bad o2 sensor = ??

[Chiketkd]

Originally posted by Bwana
Ok, it was code:
P0145 - O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)

Holy cow, I pulled that same code this week for the first time on my SVX as well.

From hanging with Tom (Svxfiles) today and talking to him about the code, the O2 sensor at fault is the third one (behind the transmission). Per Tom, this 3rd O2 sensor isn't used by the ECU to change the afr, but to monitor how efficiently the first two O2 sensors are working (for emissions).

The code is basically saying that it is taking a longer time than specified for your O2 sensor to take a reading. This is probably an indication of age, but could also mean that there's a bunch of crud coating it.

Tom used an appropriate sized wrench and undid the third O2 sensor, cleaned it off with throttle body cleaner, let it air for a while and popped it back in. I'll see if I get the code again. If so, then I'll just get a new O2 sensor later on in the Spring...

-Chike