Master Light
These are both Master Dashboard Warning Light and Attention symbols, in red. If this light is on, there will likely be text displayed as well on the instrument panel, or another warning light. Look for text in particular. It could very well point out something as serious as low oil pressure. However, despite the serious look to the symbol, it is generally associated with simple reminders such as a door ajar or that it is time to change the oil.
- First, are you sure this is your symbol?? If yes, then read on below!
- Otherwise return to our main Picture Symbols page and scan again!
So, what’s up with the next one??
This same symbol, an exclamation point in a triangle, in yellow/amber has been used by European and Asian vehicle manufacturers in two ways. First, it indicates a fault in the vehicle’s Stability Control System, as well as a slip indicator. Click here for more. The vehicle can be driven with caution, but without the benefit of the advanced electronic control system.
Second, it is used in many cases to indicate that a text warning is available in the vehicle’s Information Display. It may involve a malfunction in any system. A Check Control message will likely require changing screens to discover the root problem.
Related Symbols
And then there are these, which feature a lower case letter “i” in a square. It too is meant to alert the driver to look for a message in the information center, but the message will not involve a serious drivability issue. The manufacturer uses the red triangles for this. It may be seen in yellow/amber or black and white.
Finally, this version with a single triangle plus the exclamation point may be used to indicate a failure of a High Voltage System or Battery in a hybrid or electric vehicle (EV). Click this link for more.
If you’re seeing red, see your dealer or authorized service center as soon as possible.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
These symbols are Hybrid System Operation Indicators 
This and the images that follow below are Hybrid EV Mode Indicator 
The same basic image as above with a line drawn through it indicates that EV mode is not available, again because the proper conditions are not met. It may also mean that a destination may have been chosen in navigation that exceeds the hybrid battery range.
The text only symbol, eDRIVE, is found in hybrid systems that switch between using the internal combustion engine, the high voltage battery, or a combination of both automatically when conditions warrant. It will be displayed when the vehicle is under battery power alone.
This text only symbol, eBoost, will be displayed when a hybrid vehicle is under extreme acceleration, such as in passing situations. It indicates that the high voltage battery is in full use to support or Boost the acceleration.
This symbol, also in black and white features a drawing of an internal combustion (IC) engine with an embedded circular arrow. It indicates that the hybrid vehicle is operating on the IC engine alone.
This image indicates that use of the high voltage battery is on hold. The vehicle will operate using the IC engine predominantly in order to maintain the charge level in the high voltage battery. It too is in black and white.
These two are related as they both indicate that hybrid operation is in automatic mode. The second adds a slightly misshapen triangle underneath which indicates that the navigation system is active and that navigation data is being taken into consideration.
This set of indicators come from Honda Motors Corp. found in their Hybrid vehicles: Auto Mode, Charge Mode, and EV mode. In Auto Mode, the vehicle selects which propulsion source is most appropriate, the electric motor, the gasoline engine, or a combination of the two and automatically switches to it. In Charge Mode, the engine starts and the High Voltage battery charges. In EV mode, the vehicle is propelled exclusively by the electric motor, so long as the battery has sufficient charge. And to the extent of battery charge, these modes can be chosen at will by the driver.
These final three images are associated with what is termed a Mild Hybrid System, which uses a smaller, 48-volt battery to assist the driveline. The first image is displayed when the battery is supplying power. The second indicates that the battery is supporting high acceleration. The third image indicates that power from the mild hybrid system is unavailable.
These symbols are used in two ways. Most commonly it is a Frost or Freeze Warning Indicator symbol. Also, particularly those in the colors interpreted as 
Note that in some electric vehicles (EVs), the same symbol or a similar one in 
The version on the far left, which includes lane markers, is used exclusively to indicate cold weather and the possibility of frost on the roadway. The same is true of the second version, where the snowflake or ice crystal image is shown in a triangle.
This is the Lambda Sensor Warning Indicator 
These are Tow or Haul Mode and Fault Indicator 
In more advanced models, the second image above with the trailer is used to indicate that a Trailer Merge Assist system has been activated. It is tied directly to the vehicle’s 
The image with arrows above the trailer is no more than a Trailer Connected indicator. It illuminates when a trailer is connected and will go out when it is disconnected. The same is true of the image of the trailer hitch ball and the trailer, both shown in 
These versions however, are trailering fault warnings. The exclamation point in the triangle above the trailer in the first image is the give away. If illuminated, check all electrical connections as well as the physical trailer connection(s). Otherwise, the issue may involve the main vehicle’s suspension or stability control systems and a qualified service shop will be needed.
Some vehicles offer Sway Control for use while towing, a system that works in in conjunction with the Stability Control System. And like that system, the Sway Control Indicator will flash when sway is detected and being corrected.