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Discussion Starter #1
I just had my 2000 9-5 Wagon SE V6 3.0L in the shop for annual safety/emissions testing.

The mechanic connected his hand held code reader to my car and it came back with three faults.

The first said "02 Sensor"

The second said "Catalyst"

The third said "Component"

I'm pretty sure that the third "component" failure is the ABS module which is out of the car being rebuilt. The first two readings have me a bit lost. Is the 02 sensor the same as the oxygen sensor? What is the "catalyst"?

Thanks!
 
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