Originally posted by kiwiford:
...Can the oxygen sensor be cleaned? And lastly it looks like a 4 wire sensor in front of the cat and a 2 wire sensor behind - why is that?

Thanks, Malcolm


I don't think the O2 sensor can be cleaned as it is too sensitive. From TSB, "Use care in handling HO2S sensors: In the event of catalyst replacement, use care in the handling of HO2S sensors to prevent damage or contamination." A bad sensor can cause bad mileage and bad engine performance.

Edit. TSB for additional reading info on O2 sensors and cat.
http://www.v8sho.com/SHO/TSB0197HO2SServiceTips.htm

Last edited by Tony2005; 01/21/06 09:59 PM.
"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles