Powertrain
These are Drivetrain, Shift or Powertrain trouble symbols or lights, and will be red or yellow/amber if it comes up. This same symbol is also used as an Electric Shift Control System Warning Indicator. It indicates a problem has been detected generally in an automatic transmission or transaxle, or its shift system. This part of the drivetrain should be serviced as soon as possible.
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This version in black and white will be seen in the vehicle’s information display. It may indicate that the transmission is overheated or there is a park lock malfunction or a major transmission malfunction. Fortunately, a text description will be seen as well.
This version is also seen in black and white. It accommodates all of the shift positions with their first letter, D, P, R, etc. If all are seen together and is found to be blinking, there is an issue with the transmission the will need service as soon as possible.
There is little that is user-serviceable in these systems, so you will need the help of your dealer or authorized service center. Some manufacturers also use these to indicate an engine problem, but the Check Engine light is generally reserved for this.
More Versions
While the exclamation point is a recurring motif in automotive instrument panel symbols, the wrench is a bit more rare. Neither is it very informative unless, a) the driver is already familiar with it or, b) the driver stops and reads the owners manual. It often indicates a transmission problem, particularly if seen in red, but it also is used for other purposes. Do consult your manual.
Do not confuse the first image with the Settings Indicator symbol on the left. It is nearly identical to the bumpy circle used when referring to the transmission, but lacks any addition in the center and is shown in gray scale. The settings indicator will most generally be seen in the separate Information Display and is the what we have become used to seeing on our phones and computers.
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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.
This is a Loose Wheel Warning Indicator 
These are AdBlue Indicator 
Another adds a wrench or spanner to the AdBlue text. In 
Electric Park Brake and Fault. These 
The 
indicate a fault in the system if illuminated. If this light is seen along with a 
These are alternative to or in addition to Engine Oil Level Warning Indicator 
The same symbol with the added text MIN, says that the engine’s oil level has dropped to its minimum level for safe operation. Alternatively, the symbol shown as a dip stick with a drop of oil falling from it in 
This is an Engine or Transmission Electronics Fault Indicator 
The symbol showing a vehicle with a wrench or spanner inside it is also used as an electronics fault warning. However, some manufacturers use the very same symbol as a service reminder only. If the vehicle is operating properly, and its been a long time since its last oil service, this may be the only issue. Consult your owners manual to be sure and 
This symbol is used as an Engine Electronics Fault Indicator only. It is seen as a rectangle with a wavy or ragged line inside. Whether or not any change in the vehicle operation is seen, the fault should be checked out by a good service shop as soon as possible.
Note that some manufacturers use the car on in the air or on the lift symbol to indicate that one of the vehicle’s systems has failed and needs repair. In a case like this, another symbol associated with the actual system will be shown as well.
All routine services in a vehicle with an internal combustion engine start with a change of the engine oil and filter. The text 
These red triangles indicate the approach or the passing of a Service Interval. The required service may be a common oil change or something more important such as a transmission service. The first is a single triangle, which may appear in 
In many European vehicles, a simple wrench (spanner) image will be displayed temporarily as a service interval approaches. It will likely be in gray scale, rather than a more expected amber.