The A in a circle symbol is found on many modern cars' dashboards and refers to the engine stop-start button (also called an idle stop/start system, or ISC). This switch activates the vehicle's Engine Stop/Start System, or ESS.
The engine start-stop light is typically an “A” surrounded by a circular arrow, and it can indicate a few different things. It may illuminate in a green or blue color to show that the system is active, or in an amber color to show that the system has been disabled.
In the event that you see an exclamation mark with a circle around it in your dash, that means something is wrong with your brakes. There may be a problem with brake components or the hydraulic fluid may need a top-off.
Stop/Start Active Light – An “A” inside an open circle on the dashboard that indicates that your Cherokee is in Auto-Stop mode.
Have you seen the button in your car that shows an arrow going in a circle? That's the air-recirculation button. Although some drivers know what it's called many don't know what it's for!
Does stop-start actually save fuel? Yes - in situations where you're stationary with the engine idling, such as in heavy traffic or waiting for traffic lights to change, it will save however much fuel would have been used by the engine while the car is stationary.
This feature automatically stops the vehicle's engine when the brake is pushed in, and the car is sitting stopped. Once the brake is released, the engine will start back up, finally making you mobile again.
Looks like: A capital letter “A” with an arrow encompassing it and an exclamation mark to the right. ? Means: There is an issue with your Stop/Start system. ?
The check engine light is usually the most serious and feared warning because of the kind of damage it can signal. This warning often indicates the potential for serious engine damage. When ignored, your vehicle could suffer from a blown head gasket or a seized engine.
The risk of carrying on driving is that the engine could overheat and performance will suffer. The car may even stop entirely, with a high likelihood of serious engine damage. So there you go. It's really important that you take these lights seriously.
When Is Auto Start-Stop Bad? Vehicles with auto start-stop installed always have a way to disable it as well. That's because sometimes auto start-stop can be dangerous. If you frequently have to manage junctions and turns where you can't spare a quarter-second without getting t-boned, it's a good idea to turn it off.
Stop/Start Technology† automatically stops and starts the vehicle's engine under certain conditions. By turning off the engine when not needed, Stop/Start Technology can help improve fuel efficiency, thereby reducing greenhouse gas emissions (compared to the same vehicle with Stop/Start Technology not in use).
While it is not possible to permanently disable this feature, you are still able to disable it. With a normal vehicle, stop-start can be paused by pressing the “A Off” button next to your car's gear shift.
There are many people who dislike it because the feature has become mandatory, as in you cannot default it to off, and many people do not like being told what to do. It's annoying and could add extra wear and tear on engine parts including the battery. Most vehicles give you the option to turn it off.
Myth #1: Stop-start engines use more fuel
This saving may seem small but would certainly add up over the lifecycle of your car. In any case, the data shows that they certainly don't use more fuel.
Unless you drive a vintage, carburetor-equipped vehicle, you'll save fuel and reduce carbon dioxide emissions by turning it off. Some drivers think that idling uses less fuel than restarting, but our research has found that drivers save fuel and reduce emissions by shutting down for stops as brief as 10 seconds.
Vehicles with Stop Start systems require 5 to 10 times more engine starts when compared to their conventional counterparts. This puts a lot of strain on the vehicle's battery.
Stop/Start Technology† automatically stops and starts the vehicle's engine under certain conditions. By turning off the engine when not needed, Stop/Start Technology can help improve fuel efficiency, thereby reducing greenhouse gas emissions (compared to the same vehicle with Stop/Start Technology not in use).
Start-stop systems require a battery with modern technology, because normal starter batteries are not designed to meet the higher demands of these vehicles.
ABS Light:
This light will feature the letters ABS surrounded by a circle, with a parentheses outside the circle. This light will indicate that your brakes need to be serviced. It can also indicate a problem with the anti-lock brakes or with your Toyota's Brake Assist system.
How they work: When you're stuck at a red light, in a traffic jam or ordering at the drive-through, your car is wasting gas while not moving. Start-stop systems shut off the vehicle's engine when the car isn't moving. When you hit the gas to move again, the engine restarts.
Simply press the Off button to the left of the steering wheel on your dashboard to deactivate the system. You can reactivate the system by pressing that button again or by restarting your vehicle.
If you turn the engine off, you will lose power to the engine, power steering, and every other vital part of your car that allows you to control it. If you can't control the car, you could get into an accident and injure yourself or other motorists. So, don't tempt fate.