Damage to the automobile oxygen sensor may have the following effects:

1. Engine performance degradation: Damage to the oxygen sensor will cause the engine control system to be unable to accurately measure the oxygen content in the exhaust gas, thus affecting the combustion efficiency and leading to engine performance degradation, such as unsmooth acceleration and insufficient power.

2. Decline in fuel economy: The damaged oxygen sensor will reduce the combustion efficiency of the engine and the fuel mixing ratio is incorrect, which will lead to a decline in fuel economy and an increase in vehicle fuel consumption.

3. Excessive exhaust emission: Damage to the oxygen sensor will lead to incomplete combustion of the engine, and the emission of harmful gases in the exhaust gas will increase, which may lead to excessive exhaust emission of vehicles, which does not meet the requirements of environmental protection.

4. Unstable engine operation: The damaged oxygen sensor will lead to unstable engine operation, which may lead to unstable idle speed, jitter, fire and other phenomena.

5. The detection light is on: When the oxygen sensor is damaged, the Check Engine Light of the vehicle may be on, prompting the driver that there is a problem and it needs to be repaired in time.

To sum up, the damage of automobile oxygen sensor may have an impact on engine performance, fuel economy, exhaust emission, engine stability and vehicle fault indicator light. Therefore, once the oxygen sensor is found to be faulty, it should be repaired or replaced in time to ensure the normal operation of the engine and the exhaust emission meet the environmental protection standards.