What Does Collision Warning / Pre-Collision Assist Light Mean?
Reviewed by automotive technicians · Last updated August 22, 2026
Quick Answer
Collision Warning / Pre-Collision Assist Light = The Pre-Collision Assist system uses radar and camera sensors to detect vehicles, pedestrians, and obstacles ahead. When the system calculates that a collision is imminent and the driver has not braked, it illuminates this warning, sounds an audible alert, and may pre-charge the brakes. If the light stays on continuously without an obstacle ahead, the system has a sensor malfunction. A flashing red light with an audible alert means the system is actively warning you to brake immediately.
Severity: Warning · System: Ford F-150 (2015-2025)
DRIVE WITH CAUTION — Repair Soon
The Pre-Collision Assist system uses radar and camera sensors to detect vehicles, pedestrians, and obstacles ahead. When the system calculates that a collision is imminent and the driver has not braked, it illuminates this warning, sounds an audible alert, and may pre-charge the brakes. If the light stays on continuously without an obstacle ahead, the system has a sensor malfunction. A flashing red light with an audible alert means the system is actively warning you to brake immediately.
What you see: An orange or red icon showing two vehicles from the side with a collision indicator, or a 'Pre-Collision Assist' warning on the instrument cluster display
What to Do Right Now
If the light flashes with an audible alert, apply the brakes immediately — a collision is imminent. If the light stays on continuously without an obstacle ahead, the system has a malfunction. Check if the front radar sensor (behind the Ford emblem in the grille) or the windshield camera is blocked by snow, mud, ice, or debris. On the F-150, the radar sensor is located behind the Ford oval emblem — if the emblem is damaged or covered in ice, the system will not function. You can continue driving — the vehicle is safe to operate, but the collision warning system will not function.
Repair Cost Estimate
| Option | Est. Cost | Notes |
|---|---|---|
| Do It Yourself | $0 (cleaning the radar sensor behind the emblem); $50-100 for a replacement emblem if physically damaged | If you have basic tools and mechanical knowledge |
| Mechanic / Dealer | $120-200 diagnostic; $300-600 for radar sensor replacement; $200-400 for camera recalibration | Includes diagnostic labor + parts |
About This Data
Dashboard warning light information compiled from Ford owner's manuals, OEM service documentation, SAE J2402 standards, and NHTSA guidance. This is an independent reference — not affiliated with or endorsed by Ford. All brand names, model names, and dashboard symbols are trademarks of their respective vehicle manufacturers.
Published: 2026-08-01 · 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.
By Patricia N. Simmons — Automotive Electronics Specialist
Patricia has spent 12 years researching instrument cluster diagnostics and dashboard warning light systems across 20+ automotive brands. She has analyzed over 500 OEM owner's manuals and SAE standards to compile this reference. Her experience includes field diagnostics with certified technicians, cross-referencing NHTSA technical service bulletins, and building practical decision guides that help drivers understand exactly what each warning light means — and whether they should keep driving or pull over immediately.
About Patricia · Published: 2026-08-01 · Updated: August 22, 2026
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Frequently Asked Questions
Can I drive my Ford F-150 with the Collision Warning Light on?
Yes — the vehicle is safe to drive, but the pre-collision assist system will not function. Exercise extra caution and maintain safe following distances. If the light is flashing with an audible alert, brake immediately to avoid a collision.
How much does it cost to fix the Collision Warning Light on a Ford F-150?
DIY cost: $0 (cleaning the radar sensor behind the Ford emblem). Mechanic estimate: $120-200 diagnostic; $300-600 for radar sensor replacement; $200-400 for camera recalibration. The radar sensor behind the Ford emblem is exposed to road debris and weather.
What causes the Collision Warning Light to come on in a Ford F-150?
The most common causes: the front radar sensor behind the Ford emblem is blocked by snow, ice, mud, or debris; the windshield camera is obstructed; the sensor is misaligned after a minor collision or grille replacement; or the system has an internal electronic fault. In winter, ice buildup on the Ford emblem is the #1 cause — clear the emblem area and the warning should reset after a few drive cycles.