Changed o2 sensor, code still on

Discussion in 'Engine Performance + Maintenance' started by scott_williams2, Mar 17, 2019.

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  1. scott_williams2

    scott_williams2 Newbie

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    So my truck is a 95 k1500 350 tbi. Code 13 popped up a week ago which is o2 sensor. The truck ran great no problem just a shaky idle but the rpms didn't jump or anything. I changed the sensor cuz my OCD about the engine light. Left the battery disconnected all night reconnected it this morning cranked it no engine light. 10 seconds later it pops up. Why is it still on?
     
  2. Kv5137kv5137

    Kv5137kv5137 I'm Awesome

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    Because it’s not the sensor. Sensor responds to what’s coming out of engine. Bad mix, lean? Rich?


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  3. jkeaton

    jkeaton It’s been real

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    Or, the connector, or the wiring....
     
  4. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    Data log. Did you get anti-seize on the sensor? I'm guessing it's a 1 wire sensor? It relies on grounding through the manifold.
     
  5. scott_williams2

    scott_williams2 Newbie

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    So the craziest thing happened yesterday. I changed my oil and I noticed a dangling quick connect plug by my starter. I plugged it back in and finished changing my oil and sure enough my engine light went away lmao
     
  6. jkeaton

    jkeaton It’s been real

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    lol
     

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