There are quite a few potential problems that can be caused by a faulty EGR valve: Lean burn, which can result in damage to the valves and/or pistons, caused when the faulty EGR valve allows too much fresh air into the intake. When the opposite occurs, (too little fresh air), the idle speed can drop potentially not idling at all.
This is generally the explanation when you get a PO401 check engine code. It is ussually caused when the carbon builds up in the channel leading from the EGR through and into the thottle body. Most of the time it can be fixed by cleaning the passage with a good carb cleaner and a wire pipe cleaner restoring the flow of air through the passage. Sometimes you might have the replace any one of the EGR Value, EGR Solinoid or the EGR Pressure Sensor. These can be costly, so begin with the cleaner. You may have to remove the thottle body face plate to gain better access to the channel.
Scarcity is the result of having too little of a product to meet the demand for it.
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Blood is supplied to the brain. Too much of a blood supply to the brain could lead to damage and too little blood flow can result in strokes. Nasal bleeding is usually caused by polyps or trauma.?æ
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Eating too little is bad. It increases the risk for malnutrition. The result of being malnourished is unhealthy.
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Too little water can result in cellular and extracellular dehydration and eventual death.
The code means that EGR flow is insufficient. That probably means the EGR valve is stuck partially open or the EGR pump is not working correctly. You probably need to get it repaired before too long or it will dirty up your engines interior pretty bad. If you know of a good independent mechanic, it's a pretty easy fix and he will probably have an online source to get the parts a little cheaper. The dealers get pretty proud of these repairs and you are probably looking in the neighborhood of 300-500 dollars for the repair.
Too little serotonin can lead to depression, anxiety, and mood disorders. Conversely, too much serotonin can result in serotonin syndrome, which can cause symptoms like confusion, agitation, elevated heart rate, and seizures.
If there is too little oil, engine damge could result. If there isis too much, a fouled plug will likely result.