# O2 goes to zero? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** grand-cherokee, jeep\ **Created:** [July 30, 2018, 2:04pm UTC](https://community.cartalk.com/t/o2-goes-to-zero/121947 "2018-07-30T14:04:06Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![instock](https://avatars.discourse-cdn.com/v4/letter/i/22d042/32.png) [@instock](https://community.cartalk.com/u/instock)\ **Post date:** [July 30, 2018, 2:04pm UTC](https://community.cartalk.com/t/o2-goes-to-zero/121947/1 "2018-07-30T14:04:06Z")
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? ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [July 30, 2018, 2:58pm UTC](https://community.cartalk.com/t/o2-goes-to-zero/121947/2 "2018-07-30T14:58:21Z")
Could be a corroded connector contact or a broken wire. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [July 30, 2018, 3:43pm UTC](https://community.cartalk.com/t/o2-goes-to-zero/121947/3 "2018-07-30T15:43:25Z")
If the O2 sensor detects any pure oxygen, the voltage from the sensor will drop to 0 volts. Tester ---
**Author:** ![instock](https://avatars.discourse-cdn.com/v4/letter/i/22d042/32.png) [@instock](https://community.cartalk.com/u/instock)\ **Post date:** [July 30, 2018, 3:56pm UTC](https://community.cartalk.com/t/o2-goes-to-zero/121947/4 "2018-07-30T15:56:37Z")
It’s unlikely that I have pure oxygen in my exhaust, so it’s probably a wire or connector?