You are backing out of a parking spot, a yellow icon flashes on the dash, and it looks like a car about to rear-end a wall. Your brain scrambles. Is that a warning that something is broken, or is the car just telling you it did its job? After fifteen years in service bays, I can tell you that the little collision-related symbols confuse more drivers than almost anything else on the cluster, mostly because every automaker draws them differently.
This chart walks through the collision-warning and braking symbols you will actually see, grouped by what they mean rather than by brand. Once you learn the shapes, you can decode a rental car in Denver or a friend’s truck in about ten seconds.
Key takeaways
- Most collision warning symbols show a car, a person, or radar waves paired with a braking or alert cue.
- A steady amber light usually means a system is degraded or switched off, while a flashing red icon means the car is warning you right now.
- Symbol color matters: green or white is informational, amber is caution, red is act now.
- The same fault can look completely different between a Toyota, a Subaru, and a Honda.
Before we get into the list, one ground rule I give every customer. Color is your first clue, shape is your second. Let the color tell you how urgent it is, then read the shape to learn which system is talking.
1. The classic forward collision icon: car hitting a car
This is the one most people picture. It shows one vehicle from behind with a second vehicle or a flat wall in front of it, often with impact lines or an exclamation point between them.
When it glows amber and steady, the forward collision system is either warning of a slow-developing hazard or telling you the feature is limited. When it flashes red and beeps, the car sees an imminent crash and wants your foot on the brake now.
If you are not sure whether your alert is a warning or a fault, our breakdown of the forward collision warning light meaning sorts the two apart with real dash examples.
Good to know
Forward collision warning and automatic braking are two different features that often share one symbol. The warning alerts you; the braking actually stops the car. Learn the split in our guide to the difference between AEB and forward collision warning.
2. Radar and sensor waves: the curved lines icon
Some brands skip the crash drawing and instead show a car with curved waves radiating from the front, like ripples. Those waves represent the radar or camera watching the road.
On many Fords and GM vehicles, an amber version of this icon with the word OFF or a slash means the driver assist sensors are blocked or disabled. I see this constantly after a fender bender, because the radar behind the bumper got knocked out of aim.
3. The pedestrian figure: person plus car
A walking human silhouette next to a car body signals the pedestrian detection portion of the braking system. Toyota, Subaru, and Honda all include this on newer models, typically 2018 onward.
When it lights amber, the pedestrian function may be limited by a dirty camera or low light. When paired with a red flash, the car believes a person is in your path. To understand how the camera decides, read how pedestrian detection braking actually reads the scene.
4. Brand-specific braking symbols
Here is where things get messy. Automakers name and draw their systems differently, so the same underlying tech shows up under a dozen labels.
| Brand system | What the symbol looks like | What it signals |
|---|---|---|
| Toyota Pre-Collision (PCS) | Car with the letters PCS or a car-and-car icon | System active, limited, or off |
| Subaru EyeSight | Twin camera eyes or a car icon | Cameras clear or obstructed |
| Honda CMBS | Car with radar waves, amber | Braking degraded or disabled |
| Ford / GM | Car with front sensor waves | Front sensor blocked |
If you drive a Toyota, the flashing PCS message deserves its own read. Our Toyota Pre-Collision System warning guide covers the exact wording Toyota uses and what each phrase means.
Subaru owners see something totally different. The Subaru EyeSight pre-collision braking guide explains why the two camera eyes go dark and how to bring them back.
5. The system off or unavailable message
Sometimes there is no cute drawing at all, just a text line like PRE-COLLISION SYSTEM UNAVAILABLE or COLLISION MITIGATION SYSTEM PROBLEM. Honda spells this out plainly.
Watch out
A message that the system has switched itself off is not the same as you turning it off. If it happened on its own, something triggered it. Our page on the AEB turning itself off warning lists the usual culprits.
Honda drivers in particular should skim the Honda CMBS collision braking explainer, since Honda relies on a windshield camera and a grille radar that fault for different reasons.
6. The temporary blockage symbol
This one is friendly. A car icon with a snowflake, a sun glare, or a dirty-lens mark means a sensor is temporarily blinded, not broken.
I tell drivers to think of it like a person squinting into headlights. Clear the camera glass, wipe the radar area, wait for the fog to lift, and it comes back. Winter is the worst season for this, which is why we wrote a full guide on AEB not working in winter weather.
Color tells you how worried to be. Shape tells you which sensor is talking. Learn both and no dash will ever bluff you again.
7. How to read any symbol you do not recognize
Run this quick checklist the next time an unfamiliar icon appears. It works across nearly every 2016 onward vehicle I have serviced.
- Note the color first: green or white is info, amber is caution, red is urgent.
- Look for a car, a person, or radar waves to identify the system.
- Check for a slash, OFF, or an exclamation mark that flags a fault.
- Read any text message on the driver info screen for the exact wording.
- Cross-reference the owner manual glossary, which lists every icon for your model.
Tip
Snap a photo of the lit symbol before you clear it. If the light is intermittent, that picture saves you and your technician a lot of guesswork later.
What a lit symbol is trying to tell you
The industry has never agreed on one universal drawing, which is exactly why these charts help. The federal safety folks at NHTSA and the non-profit MyCarDoesWhat both keep plain-language explainers if you want a second reference.
Once you can name the symbol, you can decide whether to keep driving, clean a sensor, or book a scan. For the full picture of how these features work together, start with our overview of automatic emergency braking explained, then come back here whenever a new icon surprises you.
Most collision symbols are your car doing its homework, not falling apart. Learn the shapes once and you will read them for the rest of your driving life.
Questions drivers ask
A flashing red car icon paired with a beep means the collision system sees an imminent crash and wants you to brake now. It is not a fault code, it is a live warning. Once the hazard clears, the light goes out on its own.
Amber signals caution rather than emergency. It usually means the system is limited, a sensor is partly blocked, or the feature has been switched off. Check the driver info screen for a text message that names the exact issue.
No, and that is the main source of confusion. Toyota uses PCS lettering, Subaru shows camera eyes, and Honda spells out CMBS messages in text. The color coding is more consistent than the drawings, so read color first.
Not usually. Many symbols appear briefly when a camera is dirty, foggy, or glare-blinded, then clear once the view improves. A steady message that the whole system is off or unavailable is the one worth investigating.
Your owner manual has a warning light glossary that lists every symbol for your model and year. Snap a photo of the lit icon, then match it against that glossary or a brand-specific guide for the clearest answer.
