A faulty car assistance feature is often a cause for concern, especially if you rely on them often. One such feature is the cross-traffic alert system, which helps drivers safely drive out of parking space.
Cross-traffic alert systems detect objects approaching from the rear sides of the car while it’s in reverse gear. Some even alert the driver if there are oncoming pedestrians.
It’s no wonder many drivers dread the cross-traffic system fault error code, which often indicates issues within the vehicle’s internal components.
A faulty cross-traffic alert system will display “Cross-traffic system fault” when the system is compromised. Here are some of the most common issues that cause the error:
If the two sensors on your car’s rear bumper get damaged, they’ll sometimes alert the system and display the error code.
Dirt and grime build-up due to driving on mire could prevent the sensors from detecting the ultrasound waves. Damage due to crashing into surfaces or bumping into other cars could also cause the sensors to malfunction.
You can check if the sensors are functioning by listening to them. If they don’t produce ticking sounds, you might have to replace them.
Electronic control modules (ECM or ECU) relay the information from the sensors to the cross-traffic alert system. When the ECM malfunctions, it could send incorrect information to the system, which leads to the error code.
One of the main reasons the ECM malfunctions is moisture. Rainwater can seep into the vehicle, which short-circuits the modules. The worst-case scenario is if the water starts corroding the wires, damaging the system beyond repair.
Similarly, the system also communicates with body control modules and powertrain control modules. The more options the vehicle has, the more communication takes place.
Similarly, the (cross-traffic alert) system also communicates with body control modules and powertrain control modules. The more options the vehicle has, the more communication takes place.
–Anthony Harlin, ASE Certified Master Automobile Technician
Since the cross-traffic alert system works by audibly alerting you of incoming vehicles, it won’t work with a damaged speaker. Once the speakers are compromised, the alert system will notify you that it’s malfunctioning.
Electrical malfunctions are one of the leading causes of a faulty speaker system. They’re often due to constantly using the speaker at high volumes, which fries the voice coil up.
Try and turn on the speakers before using the cross-traffic alert system to confirm if it’s working. If the sound is unclear, fading, or absent, then you’ll need to have the speakers repaired or replaced.
Software issues within the alert system often lead to the error code coming and going. Unfortunately, there aren’t any specific causes or reasons why the software malfunctions.
You can use a software scanner to determine the exact issue and how to address it.
The cross-traffic alert system is also prone to false alarms, especially when there are other cars in the parking space. The sensors could mistake stationed vehicles for moving ones when you’re quickly backing out.
Fortunately, false alarms usually go away by themselves. You can prevent them by turning the system off if you’re certain there aren’t any moving vehicles nearby.
Your car’s battery powers the cross-traffic system. If it’s drained, the system could malfunction because it’s not receiving the voltage it needs to work.
Listen for a clicking sound when you turn the ignition on. The sound is often present when you have battery issues. Similarly, you can diagnose it by observing the headlights, If the headlights are dim, the battery might be close to empty.
How to fix the cross-traffic system error fault depend on what’s causing it. Here are some common fixes plus a prevention tip:
If faulty sensors triggered the error code, it’s best to replace them immediately. Repairing the sensors is another option, but it’s more cost-efficient to install new ones.
The price of replacing the rear sensors ranges between $900 and $1,000, depending on your vehicle’s year, make, and model.
If an empty battery caused the system to malfunction, it’s best to replace it immediately. While repairing the battery if it’s damaged is another option, issues such as corrosion are almost irreparable and not worth the cost of repairs.
The cost of replacing car batteries ranges from $100 to $250, depending on the quality of the replacement battery.
Consult with a technician if you’re unsure what’s causing the error code. Diagnosing and self-fixing is a good alternative, but nothing beats the knowledge of an expert.
Additionally, some causes need expert-level know-how and special tools to fix, such as issues with the software or speaker system.
One way to prevent the error code and other malfunctions is by avoiding parking in the rain. Doing so prevents water from seeping into the system. Similarly, avoid using the cross-traffic alert system when it’s raining.
Your vehicle has two sensors on each side of the rear bumper that uses radars to determine if there are any incoming cars or pedestrians.
When you shift to reverse gear, the cross-traffic alert system will activate the sensors and notify you of approaching objects via a warning icon on the side mirrors.
Additionally, an image appears on the instrument cluster, then an audio warning and a vibrating steering wheel and/or seats.
This system isn’t installed in every vehicle model. Check your car’s user manual to see what features the cross-traffic alert system comes with.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.