Your hill information light tells you the system that helps you hold the car on a slope is not working
The hill information light is a dashboard warning that appears when your vehicle's hill start information system has detected a problem. This system helps prevent your car from rolling backward when you release the brake on an incline — it holds brake pressure for a few seconds while you move your foot to the gas pedal. When the light comes on, that automatic hold is not functioning, and you will need to manage the brake-to-gas transition yourself on slopes.
The light usually appears as a car on a slope with an arrow or brake symbol. It may stay on constantly, flash when you start the engine, or come on only when you drive uphill. The exact behavior depends on your vehicle's make and model, but any version means the same thing: the system needs attention before it fails completely.
You can still drive safely with this light on — hill information is a convenience feature, not a safety system. But you should understand what triggered it and whether it points to a larger problem with your brakes or transmission.
Key Takeaways
- Hill information light means the automatic brake-hold system on slopes is not working, but you can still drive by managing the brake and gas yourself.
- The most common causes are low brake fluid, worn brake pads, a faulty brake sensor, or a transmission problem — not all of which are urgent.
- Check your brake fluid level yourself first; if it is low, top it up and see if the light clears after you restart the engine.
- If the light stays on after you refill brake fluid, or if it comes with other warning lights, schedule a diagnostic scan at a shop within a week.
- Do not ignore the light if it appears alongside a red brake warning light or ABS light — those indicate actual brake system problems.
Why the light comes on: the most common causes
Hill information relies on your vehicle's brake system and transmission to work together. When either one has a problem, the system disables itself and the light turns on. The most frequent triggers are low brake fluid, a worn brake pad sensor, or a transmission fault code.
Low brake fluid is the easiest to check and fix yourself. As your brake pads wear down over time, the fluid level naturally drops. Your car's computer detects this and disables hill information as a precaution. Topping up the fluid often clears the light within a few minutes.
A faulty brake pad wear sensor is the second most common cause. These sensors sit inside your brake calipers and send a signal to the computer when pads get thin. If the sensor corrodes, disconnects, or fails, the computer cannot confirm your brakes are working properly and shuts down hill information. This does not mean your brakes are actually failing — just that the car cannot verify their condition.
Transmission problems are less common but more serious. If your transmission has a fault code stored in its computer, the vehicle may disable hill information to prevent unexpected behavior on slopes. This usually comes with other symptoms like rough shifting or a transmission warning light.
Check your brake fluid level first
Before you go to a shop, spend five minutes checking your brake fluid. This is the single most likely cause and the easiest to rule out yourself. Open your hood and locate the brake fluid reservoir — it is usually a translucent plastic tank on the driver's side of the engine bay, labeled "BRAKE FLUID" or with a brake symbol.
The reservoir has a minimum and maximum line marked on the side. If the fluid level is below the minimum line, your hill information light is probably on because of this. Brake fluid comes in different types depending on your vehicle; check your owner's manual or the cap of the reservoir to see which type yours uses. Most common vehicles use DOT 3 or DOT 4, both available at any auto parts store for under ten dollars.
Pour fluid slowly into the reservoir until it reaches the maximum line. Do not overfill. Close the cap, shut the hood, and restart your engine. If the light was caused by low fluid, it should turn off within a minute or two of driving. If it stays on, the problem is something else and you will need a diagnostic scan.
If you find the fluid level is normal and the light is still on, do not add more fluid — overfilling can damage the brake system. Move on to the next step.
When to take it to a shop for diagnosis
If the light stays on after you check the brake fluid, or if it appears alongside a red brake warning light or ABS light, schedule a diagnostic scan within a week. A shop will plug a scanner into your vehicle's computer and read the fault codes stored in the brake and transmission systems. This tells them exactly which sensor or component is causing the problem.
The scan usually costs between fifty and one hundred fifty dollars and takes thirty minutes to an hour. Once the shop knows the fault code, they can tell you whether the fix is straightforward (like replacing a brake pad sensor for one hundred to two hundred dollars) or more involved (like a transmission issue that may cost more).
If the hill information light is the only warning on your dashboard and your brakes feel normal when you drive, you can wait a few days to schedule the appointment. But if you notice your brake pedal feels soft, your brakes are making noise, or you see other warning lights, get to a shop the same day — those are signs of actual brake system problems.
How to drive safely while the light is on
Hill information is designed to make driving on slopes easier, but it is not essential for safe driving. Millions of older vehicles never had this feature. While the light is on, you straightforward need to be more deliberate when starting on an incline.
When you stop on a slope, keep your foot on the brake. When you are ready to move, press the gas pedal while you release the brake — do this smoothly and together, not one after the other. The car will not roll backward if you do this correctly. Practice on a gentle slope first if you are not used to it.
Avoid stopping on very steep hills if you can, and never coast backward to test the system. If you live in a hilly area and find yourself stopping on slopes regularly, getting the light diagnosed sooner rather than later will make your daily driving less stressful.
What happens if you ignore the light
Ignoring the hill information light itself will not damage your vehicle. The system is disabled, but your brakes still work normally. The danger comes if the light is pointing to a larger brake system problem that you overlook.
If the light is caused by low brake fluid, ignoring it means the fluid level may drop further. Eventually, low brake fluid can affect your actual braking power, which is a safety issue. If it is caused by a faulty brake sensor, the light will stay on but your brakes will still work — however, you lose the early warning that something is wrong.
The safest approach is to get a diagnostic scan within a week or two. This takes the guesswork out of whether the light is a minor sensor issue or a sign of something more serious. Once you know the cause, you can decide whether to fix it right away or monitor the situation.
Frequently Asked Questions
Can I turn off the hill information light myself?
No — the light is controlled by your vehicle's computer and turns on automatically when it detects a fault. You cannot disable it without fixing the underlying problem. Some vehicles let you turn off the hill information feature itself through the settings menu, but this does not turn off the warning light.
Is it safe to drive on the highway with the hill information light on?
Yes, as long as no other brake warning lights are on and your brakes feel normal. Hill information only matters when you stop on a slope, which is rare on highways. Just make sure you can handle the brake-to-gas transition yourself on any hills you encounter.
Will the light go away on its own?
Sometimes. If the light came on because of low brake fluid and you top it up, it will usually clear within a few minutes of driving. If it stays on after you refill the fluid, the problem is a sensor or transmission fault that will not go away without repair.
What is the difference between the hill information light and the ABS light?
The hill information light means the slope-holding system is disabled. The ABS light means your anti-lock braking system has a problem. Both are brake-related, but ABS is more critical to safety — if the ABS light is on, get it checked sooner than you would for hill information alone.
How much does it cost to fix a hill information problem?
It depends on the cause. Low brake fluid costs nothing to top up. A brake pad sensor replacement typically runs one hundred to three hundred dollars. A transmission fault is more expensive and varies widely by vehicle. A diagnostic scan will tell you the exact cost before you commit to the repair.