Hi guys

My wife's lexus Es 330 has been having the cringing sound from the rear right tire, she told me she called in a mechanic who said it might be a leaking silencer and fixed that without be me around as i was out of town. I asked her to get someone to do a scan and the car came out with the code error P0031 - HO2S Heater Control Circuit Low (Bank 1, Sensor 1).

I would like to ask the possible solution as my colleague who uses the same car here has no clue also.

Ode. 02 sensor for catalyst 1 side. Ode