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Published on Mar 30, 2010
This is a follow up video to my 1997 Saturn SC2 O2 Sensor Diagnostic video. This clip is much shorter. Same graph as the first video - RED = O2S B1S1 - BLUE = HO2S B1S2 - YELLOW = Engine Speed - GREEN = Engine Temperature. As you can see in this video, the engine is fully warmed up @ 195deg, and is at idle. Compare the first video to this one and you will notice two things - 1) S1 oscillates much faster, and with more range than the old S1 in the first video. 2) S2 (which was NOT replaced) now does not oscillate.. and holds a steady, even voltage reading. This is exactly how S2 should perform when @ operating temperature. The Saturn now passes emissions with flying colors.