Code PO141 for 2002 IS300

[Caleigh]

My check engine light came on today and I took it to Advanced Auto Parts for a diagnostic check. It came back as Code PO141; Bank 1 Sensor 2, 02 sensor heater. Does anyone know if this is the Upstream or Downstream? I have a 2002 Lexus IS 300 with 67,720 miles on it and the guy said I shouldn't have a problem with it because it's supposed to last for up-to 100,000 miles. Does anyone know if this is true?

[Brian R.]

It is the sensor after the cat converter. They normally last for over 100K, but there is no guarantee. Replace it with one matched to your vehicle with your VIN at a Lexus parts department. You don't have to buy it there, but get the correct part number there.