Locate the MAF sensor in the intake tube between the air filter and throttle body
Turn off the engine and disconnect the MAF sensor connector
Inspect the sensor and connector for dirt, damage, corrosion, or loose pins
Check the air filter and intake duct for leaks, cracks, or contamination
Reconnect the sensor and start the engine
Use a scan tool to read live MAF data at idle and under light throttle
Compare the readings to the vehicle’s specifications
Tap the sensor lightly and watch for unstable readings or engine behavior changes
Unplug the MAF sensor with the engine running and observe whether idle changes
Test the sensor power, ground, and signal wires with a multimeter
Check for proper voltage supply and ground continuity
Measure the MAF signal output and compare it to expected values
Clean the sensor only with MAF sensor cleaner if contamination is present
Reinstall the sensor and clear any diagnostic trouble codes
Road test the vehicle and recheck for codes or abnormal readings