You can use brake cleaner to clean mass air flow sensor, ensure air filter is not clogged and sensor does not need replacement. What are symptoms?
Check/replace air filter, clean the mass airflow sensor at the same time (its attached to the air filter box) with electronics cleaner spray, and then clean your throtle body (you don't have to remove it, just detach the hose and clean as you work the open/close valve by hand.
its on the air filter housing
Carburetor cleaner will do the job.
This is a mass air volume problem. Check the air filter first. This is a mass air volume problem. The first thing to check is the air filter.
How to locate and clean or replace mass air flow in Mercedes ml320
Code usually means there is a bad mass air sensor. Replace sensor and code resets. Make sure the car has clean air filter and filter box is also clean.
On a 1999 Ford Expedition : The Mass Air Flow sensor is between the engine air filter and the large diameter engine air intake tube ( it is INSIDE a round shaped plastic housing )
The mass airflow sensor would be between your engine air filter box and the big engine air intake tube
First thing to check is the mass air flow sensor. Air filter clean?? Fuel filter clean?? Can also be a vacuum leak from bad or loose hoses or intake manifold gasket.
On a 1999 Mercury Grand Marquis : The Mass Air Flow Sensor should be between the engine air filter and the big engine air intake tube
On a 1999 Ford Expedition : The Mass Air Flow Sensor is located INSIDE the round shaped plastic housing , between the engine air filter housing and the engine air intake tube
The IAT sensor on a 1999 VV Bug is located between the air filter and the throttle body. It is part of the mass air flow sensor.