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P0155 Infiniti - 2001 Infiniti I30 how to fix, where is it located?

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Can you please tell me how to repair this code P0155 on a 2001 Infiniti I30 and send me a pic of where it is located. Failed inspection because of it...thanks!

Vehicle: 2001, Infinit I30, I think it's a V6

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P0155 -02 sensor heater circuit malfucntion  (Bank 2 Sensor 1)

Bank 2 is where cylinder 2 is located at, being sensor 1 this would be the upstream 02 sensor.

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