Engine

Problem Possible causes/consequences and Solutions Solutions
The yellow Check Engine warning lamp lights up while the engine is

The yellow Check Engine warning lamp lights up while the engine is running.

 There may be a malfunction, for example:
• in the engine management
• in the fuel injection system
• in the exhaust system
• in the ignition system (for vehicles with a gasoline engine)
• in the fuel system
The emission limit values may be exceeded and the engine may be running in emergency mode.
workshop. In some states, you are required by law to immediately Have the vehicle checked as soon as possible at a qualified specialist workshop.

visit a qualified specialist workshop as soon as the yellow Check Engine In some states, you are required by law to immediately visit a qualified specialist workshop as soon as the yellow Check Engine warning lamp lights up. If in doubt, check whether such legal regulations apply in the state/province in which you are currently driving.
Vehicles with a diesel engine: the fuel tank has been run dry.
Start the engine three to four times after refueling.
If the yellow Check Engine warning lamp goes out, emergency running mode is canceled. The vehicle need not be checked.
The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the Check Engine warning lamp may light up. yellow Check Engine warning lamp may light up.		 The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.
display. Observe the additional display messages in the multifunction display.
Check that the fuel filler cap is correctly closed.
filler cap. If the fuel filler cap is not correctly closed: close the fuel filler cap.
workshop. If the fuel filler cap is closed: visit a qualified specialist workshop.
The yellow reserve fuel warning lamp lights up while the engine is running. The fuel level has dropped into the reserve range.
Refuel at the nearest gas station.
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