Mass Air Flow Sensor Replacement MAF

Step 11 - Once the sensor has been replaced, attach a code reader to the ALDL connector.

Attach Code Reader

Step 12 - Turn the ignition key to the "ON" position and follow the prompts to clear any codes in the system.

Clear Codes

Helpful Information

After starting the engine post sensor replacement, the sensor instantly calibrates itself so there is no learn time required. This sensor is subject to debris and contamination which can be avoided by cleaning the sensor (Note: Some sensors are located inside the air filter housing, not all cars are equipped with a mass air flow sensor, consult a repair manual for exact component location.)

Best Practices

  • Clean the air intake tube and connection points to ensure proper installation.


Written by
Co-Founder and CEO of
35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


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Article first published (Updated 2014-07-22)