Rear oxygen sensor detection method and device, storage medium and vehicle

The invention discloses a rear oxygen sensor detection method and device, a storage medium and a vehicle. The method comprises the steps that the running state of an engine and the first post-oxygen voltage of a post-oxygen sensor are obtained; in response to the operation state and the first post-oxygen voltage meeting a first preset condition, transmitting a preset gaseous medium to the post-oxygen sensor, and acquiring target response time which is used for representing the response time when the preset gaseous medium is diluted from the current concentration to the preset concentration in the post-oxygen sensor; based on the target response time and the calibration response time, the sensor state of the rear oxygen sensor is determined, and the sensor state is used for representing whether the rear oxygen sensor breaks down or not. The technical problem that potential safety hazards exist when whether the rear oxygen sensor breaks down or not is detected in the prior art is solved. 本发明公开了一种后氧传感器检测方法、装置、存储