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Steering: Except for the old versions that are not been updated, most of the new car models come equipped with power steering. If the lamp indicating the steering stays then there should be some problem in the system or it could even mean a complete failure of the system. In such a case, the car needs to be taken to a mechanic very fast as it will be very hard to drive a car with a steering that is not functioning properly.
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Fuel: Apart from the metre which indicates the fuel level in the car, there is also a fuel warning lamp that comes up if the fuel level of the car goes to the reserve level. It is advisable to refill the car from the nearest fueling station, otherwise the car will run out of fuel and will stop. Most of the cars will go further distance even after the fuel warning lamp goes on, but it is always better to not take chances.
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Oil Level: If the lamp indicating the oil level comes on when the car is in motion, it warns about the low engine level and reminds of refilling the engine oil. If the oil level warning light comes on one need to immediately switch off the engine and check the level of the engine oil. Driving a car which has low level of engine oil is very harmful for the car engine.
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Temperature: Either when the coolant temperature is too high or the coolant level is too low, the temperature warning lamp will turn on to indicates the same. If the lamp is on, stop the car immediately and be careful to not open the radiator cap as it will be hot and may cause injury. Check whether there is a leak in the coolant and refill the coolant to the recommended level.
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Engine: The lamp indicating the engine should go off few seconds after the car has been started, but if doesn't go off, and still remains when the car is in on the move, and then it warns of a malfunctioning engine. It is best to stop the engine and then start it again, if the problem still persists, then it is better to take the car to a near-by mechanic as delaying a service will cause serious trouble for the car engine.
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Air pressure: If the rolling circumference of the car wheel changes, then it denotes that the car tyre is not in a good condition, heavily loaded axle, or low air pressure in tyres. The condition of the wheel should be checked and should replace the tyre or do the needful as soon as possible.
There are still more car sigs which indicates faulty alternator, ESP, drop in washer fluid, and remind of an unclosed boot door or hood. These are not talking cars but being silent they can still convey what they want.