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O2 goes to zero?

09 Jeep Grand Cherokee, 75,000 miles. Intermittent check engine light. Code is P2096. O2 sensors are all new. I was thinking an exhaust leak, but when I view the data, O2S12 is all over the place and sometimes even goes to 0.000 volts. That can’t be just a leak, right?

Could be a corroded connector contact or a broken wire.

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If the O2 sensor detects any pure oxygen, the voltage from the sensor will drop to 0 volts.


It’s unlikely that I have pure oxygen in my exhaust, so it’s probably a wire or connector?