TwinTurbo.NET: Nissan 300ZX forum - Re: Cannot enter Mode II for O2 sensor monitoring.
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Subject Re: Cannot enter Mode II for O2 sensor monitoring.
     
Posted by Placuch on May 16, 2015 at 11:24 AM
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In Reply To Cannot enter Mode II for O2 sensor monitoring. posted by Goldchocobo on May 13, 2015 at 07:51 PM
     
Message If I remember correctly the procedure says in order to check the o2 sensors in mode II you need to rev up the car to about 2500 rpm once the car is fully warmed up. Only then you are going to see the check engine light blink. Light on for rich and off for lean. A good sensor will switch rich to lean (blink on and off) up to twice a second. Correct me if I'm wrong.

     
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