The wires you are talking about is to the fuse box or the oxigen sensor?
Check the wiring at the sensor area. It wraps up around the trans. Make sure it is not melted together basically. The code you have is short to voltage, which means the voltage was high, not a short to ground. The upstream sensor is the one in front of the catalytic converter, the downstream is the one behind it. A word of caution-aftermarket electrical parts can often be low quality. Also, if you do go with an aftermarket sensor, do not get a generic one that you have to cut the wiring harness up for. There are some sensors that make you cut the engine wiring harness in the vehicle, a horrible idea.
There is no way for you to visually inspect an oxygen sensor. The only way for you to know if it is good or not is to check the voltages with a scan tool, maybe backprobing with a voltmeter. I'm very sure you need at least one sensor, maybe two. There are two names for the sensors on your vehicle. There is the upstream, and the downstream.
We are not supposed to answer multiple questions without you opening a new question, but what other problems are you having?
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