Honda Accord (2018-2025): ACC / LKAS / CMBS Warning — 'Radar Obstructed' or 'Camera Too Hot'
DRIVE WITH CAUTION — Repair Soon
Honda Sensing suite (ACC/LKAS/CMBS) has detected that the radar unit (behind the Honda emblem in the grille) or the camera (at the top of the windshield) cannot see clearly. This is usually caused by: (1) heavy rain, snow, or fog — clears when weather improves; (2) direct sunlight hitting the camera at a low angle — clears when sun angle changes; (3) dirt, ice, or bugs on the Honda emblem or windshield camera area; (4) the radar unit has been knocked out of alignment by a minor front-end bump.
What you see: An orange car icon with radar waves, or messages on the MID: 'ACC Cannot Be Used — Radar Sensor Blocked', 'Collision Mitigation System Problem', 'Lane Keeping Assist Problem'
What to Do Right Now
If due to weather: the systems will auto-recover when conditions improve. If due to dirt: clean the Honda emblem in the grille and the windshield area in front of the rearview mirror. If the warning persists in clear weather after cleaning, the radar unit may need recalibration — this requires a Honda dealer visit. The car drives fine — you just lose adaptive cruise and collision braking temporarily.
Repair Cost Estimate
| Option | Est. Cost | Notes |
|---|---|---|
| Do It Yourself | $0 (clean the emblem and windshield); $0 (weather-related — wait for it to clear) | If you have basic tools and mechanical knowledge |
| Mechanic / Dealer | $300-800 for Honda dealer radar recalibration (required after any front bumper removal or minor collision) | Includes diagnostic labor + parts |
About This Data
Dashboard warning light information compiled from Honda owner's manuals, OEM service documentation, SAE J2402 standards, and NHTSA guidance. This is an independent reference — not affiliated with or endorsed by Honda. All brand names, model names, and dashboard symbols are trademarks of their respective vehicle manufacturers.
Published: 2026-07-05 · Repair costs are national averages and vary by location. Always get multiple quotes before authorizing repairs.
⚠️ Red dashboard lights demand immediate action — continued driving may cause engine damage or brake failure. When in doubt, pull over and consult a certified mechanic.
Frequently Asked Questions
Can I drive my Honda Accord with the ACC / LKAS / CMBS Warning — 'Radar Obstructed' or 'Camera Too Hot' on?
Yes, but with caution. Drive directly to a mechanic and avoid hard acceleration or highway speeds. The vehicle is drivable but the affected system is not functioning correctly.
How much does it cost to fix the ACC / LKAS / CMBS Warning — 'Radar Obstructed' or 'Camera Too Hot' on a Honda Accord?
DIY cost estimate: $0 (clean the emblem and windshield); $0 (weather-related — wait for it to clear). Mechanic/dealer estimate: $300-800 for Honda dealer radar recalibration (required after any front bumper removal or minor collision). Costs vary by location, shop rate, and whether additional components are found to be damaged during diagnosis. Always get 2-3 quotes before authorizing repairs.
What causes the ACC / LKAS / CMBS Warning — 'Radar Obstructed' or 'Camera Too Hot' to come on in a Honda Accord?
Honda Sensing suite (ACC/LKAS/CMBS) has detected that the radar unit (behind the Honda emblem in the grille) or the camera (at the top of the windshield) cannot see clearly. This is usually caused by:. The most common causes vary by model year and driving conditions. See the troubleshooting section above for model-specific diagnostic guidance.