Seen the check engine sign on your car dashboard? Unfortunately there could be no further explanation or more specific details? This is because the Check Engine light comes on whenever anything in the car goes bad. This means that you could signal a major repair, or your gas cap could be a little too loose.
Common issues that get the light up are emission control malfunctions. The emission control unit is what the car uses to keep the air cleaner. To achieve this, it uses a hand full of sensors, valves, flaps, heated wires etc. any vehicle made in the last 20years a minimum of one oxygen sensor and this don’t last forever and this trigger off the check engine light. Besides this, there are also many other minor things that can trigger the light. And some are easily corrected. Bellow are more common occurring courses:
LOOSE GAS CAP
most cars can measure how much pressure is created the gas tank. It makes use of a series of mathematical algorithms that check the driving style and tank pressure. The implication is that if the gas cap isn’t tight, the sensors think something is wrong and the Check Engine light comes on. Make sure the gas cap is tightened and check what happens. However it may take a week or so before the light goes out.
any electrical noise under the engine can cause one of your car’s sensors to take a funny signal. When this happens, you should expect to see the Check Engine light. There is this example of a ford truck that was worked upon once that showed the Check Engine light every time rain fell. After a couple of diagnostic attempt, it was realized that water that was sipping into a spark plug wire, and running down the wire to the engine’s head, causing an occasional check engine light coming up.
Every time the water ran down the wire, the light came on. Most often than rain water sipping in is the car owners who sprays his car engine down at the high pressure car wash, pouring water into every unit of the engine, thus making the light come on.
BAD SPARK PLUG WIRES
as the spark plug wires begin to age, they may start to have tiny cracks which can allow little bursts of electricity escape. This electricity was meant to go to a spark plug, and since it can’t, the engine will start to misfire slightly, signaling that one of the spark plugs didn’t give enough spark. This can cause the Check Engine light to be triggered. Check the spark plug wires for cracks and holes when the engine is off, especially around the ends of the wires. If they look shabby, replacement is needed.
LOW OR BAD OCTANE FUEL
A couple of cars are very sensitive to misfires. These cars will indicate a Check Engine with even the slightest error in your engine. Most vehicles prefer a higher octane fuel to operate at optimum efficiency. They will work fine on any fuel in many instances, but little misfires, especially when the engine is cold, can trip on the check engine light. These can often be evaded by a choice of a higher octane fuel.