Has anyone had problems with after-market 02 Sensors for the 99 Lexus ES300. I have changed the one on the front of the moter near radiator at least 6-8 times with 3 diff ones. Still code 1133

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Asked by Apr 07, 2016 at 10:29 AM about the 1999 Lexus ES 300 Base

Question type: Maintenance & Repair

Code P1133 has been coming back for over 6 months now.  I purchased what they told me was an OEM 02 Sensor.  I have 3 total for the one that is at the front of the motor near radiator, in exhaust pipe.  When I go back to the original sensor, the car runs rough, and codes rather quickly.  I've heard I should by the Bosch 02 sensor, or get one from Toyota.  Any help would be appreciated immensely.

1 Answer

93,095

I had the same code on our Lexus, tried aftermarket sensor, worked about a week light came back on, checked the wiring could not find ant problem there, replaced the sensor again still using aftermarket, lasted another week, light came back on, purchased a sensor from the dealer and installed it, ran fine no more check engine light. Was still running great right up to the wreck.

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