Reverse Parking Sensor Troubleshooting

Reverse Parking Sensor Troubleshooting

If your reverse radar is not working properly when you are backing up, there are several reasons why your reverse radar is not helping you avoid obstacles. Some problems are easy to troubleshoot and correct, while others can be difficult to track down and correct. This article will provide you with useful information that you can use to find problems with your vehicle’s reverse radar and correct them as needed.

Problems Caused by Incorrect Installation
Many problems with reverse radars are not caused by defective components or system failures. Instead, most problems with reverse radar are caused by incorrect or improper installation. Many installation problems are related to incorrect sensor placement.

For example, if you put your vehicle in reverse and the sensor causes the system to begin beeping continuously even when there are no obstacles behind the vehicle, this usually indicates that the sensor is not correctly located and installed. In this case, the sensor may be mounted too close to the ground. Most back-up radars need to be mounted 18 to 24 inches off the ground to work properly.

If the sensor is too close to the ground, it will pick up signals from the ground, causing the monitor to beep or buzz as if there is something behind the vehicle. To correct this problem, simply choose another location in the rear of the vehicle that is a few inches higher.
Aftermarket Sensors and Luxury Cars
While many luxury cars come with their own back-up radar, it’s only an upgrade or option on many cars. This means that many luxury cars are sold without this option. Many owners who have installed back-up radar on their luxury cars have ended up with the odd problem of intermittent beeping.

If you purchased a nicer car and then had the sensors installed, you may be experiencing a problem where the reverse radar causes the monitor to beep every 30 seconds or so, even if you are traveling forward instead of in reverse. This is usually caused by the car’s central computer processor testing the continuity of the brake lights or turn signals while the car is moving. This causes a small amount of current to flow through the sensor (since the sensor is usually connected to the power source for the brake lights or turn signals).

To fix this problem, you will need to purchase and install a bypass relay for your car. This will prevent strange currents from traveling to the sensor and the system will not beep when the car is not in reverse.

Now you can troubleshoot your reverse radar. Drive safely!

I agree to receive emails from this website. I can unsubscribe at any time to withdraw my consent. View our privacy policy.
Reversing Radar Frequently Asked Questions
How do I reset my reverse radar?
The reverse radar has a control unit, usually located near the center of the rear bumper. Locate the reset button on the unit and press and hold it for a few seconds.

This will reset the sensor.

Why doesn’t my reversing sensor work?
There are a number of reasons why the sensor stops working properly. The first thing you should check is if there is any dirt or debris affecting the sensor, such as small stones, dust or ice.

If the sensor is clean but still faulty, there may be a loose wire or blown fuse.

Why does my reverse sensor keep beeping?
The beeps indicate that you have a problem with your reversing sensors. These sensors may be dirty and need to be cleaned, in which case the beeping alarm will go off to alert you that you are not looking behind you properly.


If this doesn’t eliminate the beeps, there may be an electronic problem with the sensors.

How much does it cost to repair the parking sensor?
Parking sensors vary greatly in price and quality because some have more features than others. The more features, the higher the price.

Replacing a sensor can cost anywhere from $5 to $150 or more. If you purchase a sensor with a rear assembly, it will cost you nearly $500.

Can I clean my parking sensors?
The parking sensors can be cleaned and should be cleaned frequently to avoid clogging with snow, ice, dirt and other debris. Cleaning is easily accomplished with water and a mild soap solution.