Would an o2 sensor make your engine overheat?

No, an O2 sensor itself would not cause your engine to overheat. The O2 sensor monitors the oxygen levels in the exhaust and helps the engine control module adjust the air-fuel mixture for optimal combustion. However, if the O2 sensor is malfunctioning, it can lead to poor fuel efficiency and increased emissions, which may indirectly contribute to overheating issues due to excessive fuel combustion or other related problems.