Dirty Air Filter Check Engine Light
How m uch d irt is too m uch?
Dirty air filter check engine light. Have your mechanic scan your vehicle to track down the source of the problem, as it could be as simple as replacing the air filter. Since the dealer where i purchased the truck was simply too busy to look at the problem, i. With regular scheduled maintenance, most manufacturers recommend changing the engine air filter every 10,000 to 20,000 miles, mostly as a preventative step.
When i started the car the light was off. If your check engine light comes back on with diagnostic trouble code p0101, examine the air intake system for vacuum leaks. If the filters become dirty, your fuel system sensors will alert the ecu and illuminate the dreaded check engine light.
It is highly unlikely that the dirty air filter had anything to do with the code. When the unburned fuel tries to leave the cylinders, it will turn into soot. Engine airflow performance besides keeping contaminants out, an air filter must allow unrestricted airflow into the engine.
At the same time, the air filter needs to allow air to reach the engine to work at optimum levels. Brand new filters are clean and nearly white in color, while older ones will turn brown or black due to the contaminants in the air. This condition can be caused by a dirty or faulty mass air flow sensor, air filter, a blockage or restriction.
I decided to try a k&n filter after hearing my friends rave about them. If the old filter was pretty dirty, the sudden change in airflow the engine see's could make it set a code. There are many other issues that can cause a check engine light to appear, and many of them are relatively inexpensive fixes, including loose fuel caps, a/c compressor clutch relays, eec fuses, dirty ground wires, and more.
The check engine warning light will come on whenever an imbalance of air and fuel is. The most obvious way to tell if an air filter is dirty is to check to see if it looks dirty! These could be caused by a dirty mass air flow sensor or air filter, or a vacuum or exhaust leak in the system.
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