Hi,
The code is related to the rear heated oxygen sensor. In most cases, this is the result of either the sensor itself or a connection issue. So, the first thing I would do is check the connector for damage, make sure it's tight and not corroded, and make sure there are no bare wires.
If that checks good, then you can check the engine control module and the sensor itself to see where the issue is coming from.
I attached the directions below for testing. The last pic shows the location of the sensor which is after the catalytic converter on the exhaust.
Let me know if this helps or if you have other questions. Also, the first picture is the wiring schematic so that you have a reference.
Take care,
Joe
See pics below.
Images (Click to make bigger)
Monday, October 31st, 2022 AT 5:28 PM