Am I id'g the air-fuel sensor correctly ?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by SageBrush, Jul 26, 2011.

  1. SageBrush

    SageBrush Senior Member

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    My car was at the local Toyota dealership last week for DTC 3191 (separate thread for anybody interested) and the mechanic noted that the insulation for air-fuel sensor had been munched on by rodents and replacement was recommended.

    Seilerts mentioned that he just wraps the wires in electrical tape rather than exchanging the sensor, and I thought I would do the same. But if I am id'g the wire correctly, this one looks in fine shape to me.

    Wrong place, problem mechanic, or I am missing the obvious ?
     

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    #1 SageBrush, Jul 26, 2011
  2. seilerts

    seilerts Battery Curmudgeon

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    That looks like the downstream O2 sensor. The A/F sensor is a little hidden behind the connection of the exhaust pipe to the exhaust manifold. It has the accursed aluminum collar around it, which is why a special tool is required.
     
    #2 seilerts, Jul 26, 2011
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