Understanding P0133 Toyota: Causes, Diagnostics, and Fixes

Today in Jack’s mechanics, we’re dealing with a 2006 Toyota Corolla zz122 nzfe 1.8 liter with an intermittent check engine light. The fault codes showed up as p0133 with 242,250 kilometers on the car. Although the check engine light was off at the moment, the issue pointed to Bank One sensor one O2 sensor circuit slow response.

Upon analyzing the freeze frame data, we found that the engine was warm with some irregular fuel trims. This led us to believe that the issue might be related to the O2 sensor and potentially the heater circuit. So, we proceeded to conduct various tests to diagnose and confirm our suspicions.

After checking the heater and pin tensions of the oxygen sensor, it became clear that the sensor was the likely culprit for the intermittent issue. The heater circuit showed normal resistance, and further testing with a test light revealed that the heat was indeed working properly.

Ultimately, the diagnosis pointed towards a faulty oxygen sensor, and we decided to order a replacement for it. With the intermittent nature of the issue and the confirmed tests, replacing the oxygen sensor seemed like the most viable solution.

Through this diagnostic process, we were able to demonstrate how to identify and address issues related to a narrowband oxygen sensor in a vehicle. We hope this insight proves helpful and informative, and if you found this content valuable, consider liking and subscribing for more automotive diagnostics and repairs. Until next time, take care!

What is the car model being worked on in the video?

The car model being worked on is a 2006 Toyota Corolla zz122, nzfe, 1.8 liter.

What are the fault codes retrieved for the intermittent check engine light?

The fault codes retrieved are p0133.

What is the diagnostic process for the check engine light issue?

The video shows the diagnostic process for identifying an intermittent fault related to Bank One Sensor One O2 sensor circuit slow response. The diagnosis involves checking freeze frame data, battery voltage, sensor response, heater test, and pin tension check of the sensor connector.

What is the outcome of the diagnostic process?

The outcome of the diagnostic process suggests that the narrowband oxygen sensor is the likely cause of the intermittent fault, and the recommendation is to replace the oxygen sensor.

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