Oxygen sensor failures are common due to fluid leaks from the power steering pump. The power steering pump typically leaks directly onto the sensor and causes the wiring to fail. If the leaks are not repaired when the oxygen sensor is replaced, the sensor will fail again.
One or more wires in the engine wiring harness may break at the harness bend near the right strut tower. Symptoms include: Check Engine Light illumination, rough idle, drivability problems, and/or an inoperative air conditioner. Any broken wires will need to be repaired.