you need to tune the carburettor
It is a seal that prevents engine oil from entering the valve guide causing oil loss and oil burning.
"http://wiki.answers.com/Q/What_is_causing_the_engine_light_to_constantly_stay_on_in_a_vauxhall_astra_on_2001_plate_but_the_car_is_running_fine"
Almost any engine will run with a blown head gasket. Having said that: NO engine was ever meant to run with a blown head gasket!!!! Several things could be happening simultaneously while the engine is running: coolant could be entering the oil pan, causing a loss of friction protection, destroying the bearing surfaces of the major rotating members; oil could be entering the cooling system, seriously diluting the coolant, reducing it's ability to remove heat from the engine; third, oil and/or coolant could be entering the combustion chambers, fouling the spark plugs (inhibiting ignition spark), and forming unwanted unburned deposits on the pistons, cylinder walls, and compression rings, causing accelerated wear to all moving parts. DO NOT OPERATE AN ENGINE believed to have a blown head gasket---it will destroy the engine.
The engine oil helps in lubricating the machine. Oil helps in cooling the engine and lubricates the moving parts properly. The moving parts are constantly shifting and are connected to each other. Oil is needed to grease the parts so that the components move properly without causing harm to the machines.
The problem could be many things. With the check engine light coming on, it could be an internal issue in the engine, or broken engine mounts causing the vibrations. The shaking could also be caused by a separate issue from the engine, including a loose tire, or an out of balance tire, or bad suspension.
Engine rough book
Yo can not "change" an engine code. You need to repair what is causing the code.Yo can not "change" an engine code. You need to repair what is causing the code.
Sensors do not make an engine smoke, unless one is causing the engine to run rich.=Black smoke = Overly rich fuel/air mixture.==Blue smoke = Burning oil.==White smoke = Coolant entering the combustion chamber.==The O2 Sensor would be suspect if it is running rich.=
Yes it can if it is clogged or has an obstruction it will most certainly prevent fuel from entering the engine. Check that you have fuel before the filter (incoming) and then check the output of fuel from the filter.
Supercharger
An engine of a car burns gasoline inside the piston chambers. This makes the temperature to be hot when running. The radiatorfluid that cools the engine becomes hot also, where a fan and air entering the front of the radiator cools the fluid several degrees lower to mantain the temperature in an specific temperature range.When the temperature of the eninge is not controlled, it overheats causing damage to it.
If the AC is on constantly, the fan will be on constantly. If that's not it, it mught be the fan relay or the temperature sensor.