Testing O2 Sensors
 

Is there a way to test my O2 sensors? My CEL has been on for a while now and I think the O2 sensors have gone bad.

Year/make/model? Easiest way is to get or capture the code, which narrows it down significantly.

Yes, there is a way to test them, but it is somewhat inaccurate.

GEt the sensor hot, run engine to ~2500 RPM and hold it there. Senstive analog volt meter, 1v scale, look for approx. 8 voltage swings (0.2-0.8v) in 10 seconds.