Can a bad heated oxygen sensor prevent vehicle from cranking?

No, a bad heated oxygen sensor will not prevent a vehicle from cranking. The heated oxygen sensor is responsible for measuring the amount of oxygen in the exhaust gas and sending this information to the engine control unit (ECU). The ECU uses this information to adjust the air-fuel mixture to ensure that the engine is running efficiently. If the heated oxygen sensor is not functioning properly, the ECU will not be able to adjust the air-fuel mixture correctly, which can lead to decreased fuel efficiency and increased emissions. However, a bad heated oxygen sensor will not prevent the vehicle from cranking.