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Toyota Forum: 2001 Toyota Sienna - P0141 Oxygen Sensor
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Old 03-05-2017, 02:35 AM
ToyBoy275 ToyBoy275 is offline
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Join Date: Feb 2017
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Default 2001 Toyota Sienna - P0141 Oxygen Sensor

The check engine light continued to come on. It had the code P0141, Bank 1, Sensor 2; O2 sensor.

The sensor is located down****** of the catalytic converter but on the same section of the exhaust pipe unit. The sensor connects to a flange and it was rusted. One mechanic said that since it was rusted that I could get a whole new unit that included the catalytic converter. However, that would run a few dollars.

I found an exhaust mechanic who would cut out the rusted flange section and weld in a new flange. He would keep the old catalytic converter in place. Saved quite a few dollars.

Turns out the sensor was bad. It is easily replaced as hown in the following youtube video:

Hope it helps
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"oxygen sensor", p0141

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