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Old 04-05-2021, 12:55 PM   #4
142 guy
Board Member
Join Date: May 2014
Location: Saskatchewan, Canada

The O2 sensor wiring in both links is correct. The O2 sensor signal enters on pin MS pin 34. The MSExtra diagram makes provision for connection of an isolated O2 sensor signal ground back to pin 20. Not all narrowband sensors or wideband controllers have a separate signal ground.
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