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What Causes the Parking Distance Warning System to Fail?

1 Answers

StJourney

07/30/25 3:06am

Parking distance warning system failure may be caused by circuit malfunctions, leading to failed computer self-checks, or damage to a radar sensor. It could also result from faults in the vehicle's onboard system. Below are detailed explanations of the possible causes: 1. Front or rear parking radar failure: The parking distance warning system failure essentially means the front or rear parking radar is not functioning, preventing the detection of obstacle distances. If the vehicle is equipped with front and rear parking radars, the radar sensors (which emit ultrasonic waves) can be seen on the bumpers. These waves reflect off obstacles, allowing the system to calculate the distance between the vehicle's front/rear and the obstacle. 2. Sensor or wiring damage: If a sensor is damaged, it cannot emit ultrasonic waves, making distance calculation impossible. Similarly, wiring damage will also prevent wave emission. 3. Bumper impact: Since parking radars are mounted on bumpers, any collision may damage them. If a sensor is pushed into the bumper due to impact, the radar cannot detect obstacle distances. Therefore, if your vehicle has bumper-mounted radars, take care to avoid damaging them during daily use.

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