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O2 Sensor

656 Views 1 Reply 2 Participants Last post by  SunGuy61, 
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Can anyone please tell me the location of the O2 sensor on a 94 LS320. I got a "check engine" on my dash. I've checked the fuel cap. My fault code is # 21 on pin #4 which equates to a circut interuption on the O2 sensor.
Thanks in advance for the help.
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