P0141 code. what else should I check?

[bigbigworld]

I'm getting a DTC P0141 code (O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2) on my Highlander '21.
I had this sensor replaced around late 2024, and it's popping up again! I can clear the check engine light, and it'll be fine until I hit stop and go traffic or speeds below 50 km/h, then it's just back on. Same code, P0141.

any ideas on where to start looking beyond just the sensor itself? Thanks for any suggestions!

 

[buddyweiser]

If that code keeps popping up even after changing the sensor, the problem might be the wiring or the plug, like a loose connection or damaged wires. Try ti double check the fuse and make sure the sensor you got is the right one

 

[Brucee]

Why would the code only come back in stop-and-go or low-speed driving, maybe heat soak or voltage drop is messing with the circuit at those times?

 

[Abarie+]

I had the same issue on my '19 RAV4, I replaced the sensor twice, but it was actually damaged wiring near the rear subframe causing intermittent shorts. I fixed the harness and the problem never came back.

 

[HighlandCrawler]

I faced a similar issue with my 2020 SUV. I tried swapping out sensors, but nothing seemed to work. Eventually, I discovered that a frayed wire tucked away near the frame was causing shorts whenever the car slowed down. So, I'd suggest taking a close look at the wiring harness and connectors before you decide to buy a new sensor