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How does a MAF sensor work?
The Importance of Yezoauto Air Flow Meters
Installed in the intake pipe between the air filter housing and the intake manifold, most MAF sensors work on the hot wire principle. Put simply, a MAF has two sensing wires. One is heated by an electrical current, the other is not. As air flows across the heated wire, it cools down. When the temperature difference between the two sensing wires changes, the MAF sensor automatically increases or decreases the current to the heated wire to compensate. The current is then changed to a frequency or a voltage that is sent to the ECU and interpreted as air flow. The quantity of air entering the engine is adjusted accordingly.
When a MAF sensor fails, the engine will not know the right amount of fuel to add, causing several common signs:
- Check engine light
- Engine runs rich at idle or lean under load
- Engine runs rich or lean: caused by the MAF
- Rough idle or stalls
- Excessive vibrations when stationary
- RPMs changing noticeably without driver input
How to install mass air flow sensor
Step1
When replacing a mass air flow sensor, first locate the sensor which is positioned in the air intake tube between the air filter housing and throttle body
Step2
Release the safety clip and gently pull the connector from the sensor
Step3
A clamp is used to attach the sensor to the air intake tube, use a screwdriver or small socket and loosen the clamp
Step4
Next, undo the inlet clip on both sides. There are many methods of holding the MAF in place, the principle is the same
Step5
Once all mounting clips or bolts have been undone, lift the sensor and remove it from the engine bay
Step6
After the sensor has been removed, inspect internal parts and electrical connector for damage
Step7
Compare the old sensor to the replacement unit, they should match identically, remove dust caps before installation
Step8
Gently reinstall the sensor into the inlet and outlet tubes, ensuring a proper seal between the sensor and the tube
Step9
After connecting the sensor to both inlet and outlet tubes, tighten the clamp and attach the clips
Step10
Reattach the sensor electrical connector ensuring a small click, when completely connected
Step11
Once the sensor has been replaced, attach a code reader to the ALDL connector
Step12
Turn the ignition key to the "ON" position and follow the prompts to clear any codes in the system
Prince Chicky
Reviewed in the United States on February 19, 2025
This is a perfect fit for a 2004 Chrysler Crossfire 3.2l base w/a P0101 code for MAF. The part arrived a day late, but it is an easy install! It's so easy that Helen Keller & Stevie Wonder could install it. The car runs GREAT, but does idle a little funny, just a little. So, if things change and the sensor doesn't hold up, I'll change my post! So far, the value is incredible great.
Anthony Cooper
Reviewed in the United States on April 26, 2025
Just what I needed.
Bobcat
Reviewed in the United States on July 26, 2024
This part was a good fit and seemed to fix my check engine light issue plus seemed to improve the cars performance.
AshMan
Reviewed in the United States on July 13, 2024
That dreaded check engine light. You run diagnostics and find your mass air flow sensor is bad. They don;t last forever, so having this as an option to replace it is perfect. Took a few minutes to install and the car hasnt had any issues since. Even seems to run better and it seems like my mileage has improved slightly. Likely due to it being able to read the airflow properly and the cars computer can now properly calculate and adjust as needed. This was plug and play and did the job.
James Derner
Reviewed in the United States on December 4, 2024
Excellent
farrokh kazemian
Reviewed in the United States on December 27, 2024
price is right
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