Acura Road Departure Mitigation System Problem – Meaning, Causes & How to Fix

If your Acura displays a “Road Departure Mitigation System Problem”, it means the front camera or related steering systems may not be functioning properly. This feature is designed to help keep your vehicle centered in your lane using a windshield-mounted camera and steering control. When it fails, you’re at risk of unintentionally veering off the road—especially at highway speeds. Whether it’s due to a dirty camera, faulty sensor, or electrical fault, a full system scan using a tool like the YOUCANIC Scanner can quickly help you pinpoint and fix the problem before it becomes dangerous.

What Does the Road Departure Mitigation System Problem Mean?

The Road Departure Mitigation System (RDM) helps keep your vehicle centered in the lane while driving at speeds between 45 and 90 mph (72 and 145 km/h). It uses a front camera located behind the rearview mirror to detect road lines. The system has specific conditions for proper function, which can be affected by bad weather, low light, unclear lines, a dirty camera, or using the windshield wipers at high speed. If the vehicle starts to drift into another lane, the steering wheel vibrates, and a warning symbol appears. The system may also apply the brakes to maintain lane position. A warning message indicates that the system needs attention.

⚠️ Why You Should Fix It As Soon As Possible:

Safety Risk – The issue may cause the vehicle to drive into the other lane or out of the road, leading to an accident.

Performance Issues – The automatic centering and warning alert of the steering may be disabled.

Costly Repairs if Ignored – The road departure mitigation is connected to other systems and uses the same parts to perform its functions. Meaning other features may get affected and malfunction. The estimated cost of repair may range from $290 – $1596.

Common Causes

Acura – Road Departure Mitigation System Problem – 5 Common Causes and How to Fix It

⚠️Faulty Camera – A faulty camera may become faulty due to electrical issues. And needs to be calibrated once replaced. Sometimes, an obstruction from the camera view may cause the camera to fail in detecting the road lines, which may lead to a malfunction.

⚠️ Faulty Steering Angle Sensor or EPS Malfunction – If the Electric Power Steering (EPS) system or the steering angle sensor sends inconsistent data, the RDM system may not respond correctly. This can cause delayed lane correction or prevent the system from activating at all.

⚠️Wheel Alignment – A misalignment may cause the vehicle to pull left or right on the side of the road. This may affect the effectiveness of the road departure mitigation system.

⚠️Faulty Wire – Loose, frayed, or burned wires can cause a lost electrical connection.

⚠️ RDM Malfunctioning Module – Control Module could trigger false alerts. They may malfunction because of electrical issues or an outdated software update.

🛠️ Pro Tip: Use an OBD-II scanner to check for error codes related to the issue.

Common Symptoms

• A Warning Message Appears – If there is an issue with the Road Departure Mitigation (RDM), the system will trigger a warning message so the user will be notified and to fix the issue as soon as possible. 
• No Audible Alert or Warning Symbol – If the system is not activating because of an issue, it may not show a warning symbol or an audible alert.
• The vehicle drifting to other lanes – The feature may not be active while driving if there is a fault in the system. The steering may not automatically control your steering to keep it on the track. The steering symbol in green color will not show in your cluster as an indication of active RDM, and the graphic lines will also not appear on the cluster. The Lane Keep Assist and the Lane Change Assist may be affected as they share the same component, which is the camera.

Troubleshooting

Before taking your car to a mechanic, try these DIY fixes:

1. Check Battery Health – Use a battery tester, multimeter, or scanner to check for low voltage (below 12.4V). Add inspecting and cleaning the battery terminal for better contact.
2. Inspect Wiring & Connections – Look for loose or frayed wires around the camera. Clean the connector if found dirty or corroded using electronic contact cleaner spray.
3. Inspect Fuses – look for damaged or melted fuses in your vehicle’s fuse box. This could be an indicator of an electrical issue in your car.
   ONLY REPLACE OLD FUSES WITH NEW ONES OF THE SAME AMPERAGE.
4. Inspect the Front Camera for Dirt and Damage – The camera can become damaged or dirty over time. Check the camera and look for dirt, water damage, or loose wiring, including the windshield condition, as this might be the reason for the problem.
5. Camera Calibration – Not all OBD-II scanners can perform camera calibration. Some special tools are needed to perform the procedure.
6. Check Wheel Alignment – Check the tire condition and the alignment toe in and out, including the camber and caster, that may cause pulling of your vehicle.
7. Steering Wheel Calibration – Perform manual calibration or use a scanner to perform it.
8. Check the Steering System – Use the OBD-II scanner to check the steering live data. Check also if you have a related DTC on the steering system.
9.  Use an OBD-II Scanner – Follow this tutorial on how to read and clear Acura fault codes.
10. Reset the System – If the warning light or error message was caused by a system glitch, it can be cleared by disconnecting the battery for 30 minutes or using a scan tool.

Once you complete the basic checks, the next step would be to test the 12-volt battery and charge it or replace it if necessary. Especially if the 12-volt battery is over 5 years old. After that, follow the video below to learn how to read the fault codes from the RDM control unit to determine what fault codes may be present.

Acura has recalls on the Road Departure Mitigation System, especially for the ZDX 2024 EV models. Contact your nearest ACURA dealership to check your vehicle as soon as possible. You may check your vehicle if it has a recall on this website: https://owners.acura.com/service-maintenance/recalls

Common OBD-II Fault Codes

If you scan your vehicle with an OBD-II scan tool, you may see one of these codes:

• U3000-49 – Camera internal malfunction
• U3003-16 – Low or abnormal battery voltage
• U0235-00 – Lost communication with the Distance Recognition Camera Unit
• B2A60-54 – Road Departure Mitigation system malfunction (Software)
• B2A60-97 – Sensor position calibration required
• U1000-00 – LIN communication error

🚗 Need help decoding a fault code? Use the YOUCANIC Scanner to read and clear trouble codes instantly.

Follow this video tutorial on how to read and clear fault codes on an Acura.

FAQs

Can I still drive with the road departure mitigation problem warning message?
➡️ Yes, but you need to fully take over the steering as a normal driving without advance driving assistance.

Can a dashcam affect the front camera?
➡️ Yes, if the dashcam wire supply or ground is tapped on the front camera wiring. Tapping the wire may also cause resistance to the component, causing it to malfunction. You must know that the modules and sensors have a voltage reference to operate properly. If this reference is interrupted, this will lead to issues.

Why windshield wiper cause the feature to malfunction?
➡️ If the wiper is turned on at a high speed. It may interrupt or obstruct the view of the camera, which may lead to malfunction. Additionally, heavy rain or bad weather may cause the system to malfunction.

Does an aftermarket windshield cause the camera to fail?
➡️ No, the aftermarket windshield will not cause the camera to fail. But it may cause an issue if not calibrated properly.

Final Thoughts

From dirty cameras to failed modules, Acura’s Road Departure Mitigation issues are often easy to spot—but only if you have the right tool. The YOUCANIC Scanner gives you dealership-level access to all systems, including steering and camera modules, so you can fix problems yourself or head to the mechanic with full knowledge. If your Acura shows the RDM problem warning, scan it, decode it, and fix it fast—before it becomes a costly accident.