sensor assy vacuum
You can get it from toyota dealer, from other stores or get in Internet (google toyota oem parts). Also there are aftermarket parts. They are usually cheaper and in most cases will last as long (good brands).
On/by the Throttle body, should read "sensor assy map"
on the air filter housing assy
I believe it is part of the wheel bearing/ hub assy.
the sensor is part of the fuel pump assy and comes out through a hole underneath the matting in the trunk.... remove the cover and remove lines from assy and then remove assy from tank.....make sure to relieve pressure from fuel lines before you remove lines due to residual pressure in the lines...
There is a fuel temp sensor mounted on a bracket inside the tank and a low fuel sensor on the fuel pickup assy...
ck for vacuum at map sensor hose, if it is vacuum present replace the map sensor.
Before buying any sensor you need to make sure that it fits your car. You need to locate the sensor and write down its number only after that buy another one.
Remove the vacuum hose from the sensor. Pull the sensor out of the air cleaner housing. Insert the new sensor into the air cleaner housing and attach the vacuum hose.
The 2011 sonata does not have a maf it has a map sensor or manifold absolute pressure sensor located on intake manifold near throttle body assy.
it's attached to the r/s tail light assy.
If you mean fuel level sender-in the tank, most likely part of pump assy