I have a 2004 Toyota Corolla.
Check engine light was on so I took the car to Midas they pulled a code (133) and they said its Oxygen Sensor is not working and cost to fix it would be around $350 including parts & labor, I thought it’s expensive and took the car to Auto Zone for second opinion, Auto zone confirmed that Oxygen Sensor might be having problem. Then I enquired in couple of places for the price to fix O2 sensor, all most all places I got the same quote i.e. around $350 to fix it.
And after a day or so check engine light went off. Check engine light was on for a day or so.
Now I am confused, is there a problem with Oxygen sensors? Should I still go ahead and fix these sensor or should I wait till Check engine light comes back again?