is terrific! My tech's scanner doesn't do that as far as I know. He just got the newest 'head' for his AST Retreiver and it does do live data on almost all functions but I did not see that feature.

Gentlemen, what Steve said is that his scanner can force the AIR to engergize forcing extra O2 into the system causing the O2 sensor to go below 80 mv. That's pretty terrific diagnostic power.

If it O2 sensor doesn't 'move' then that would confirm the blocked passages or maybe the actuator not working/plugged, etc.

Steve, what scanner is that, model and manufacturer ??

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Regards . . . . JimF
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'94 S500 Cpe

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