I recent purchased a 2009 Aveo LT to fix up for a daily driver. I've got 4 codes for the upstream o2 sensor and live data showing 1275mv constant which according to the service manual indicates an open connection or short to voltage. Upon inspection, the plugs for the upstream o2 had been cut off and the wires from both the harness and the sensor connected with some random wires. When we saw that, we pulled that all out but now I'm trying to figure out which wires are supposed to be connected.
The harness has these colors:
Orange/Black - Tan - White - Grey
The O2 sensor has
White - Grey - Black - Purple
I want to get them reconnected properly so I can confirm whether the o2 sensor is bad of it was just the janky wiring