What to do after replacing mass air flow sensor? Making the replacement only is never the best idea for sure.

Mass airflow (also MAF) sensor is one of the key engine components of vehicle technology. This part stands between the intake manifold and an engine’s air filter. And it joins in the electrical engineering fuel injection system. This vehicle part calculates the amount of air that enters the engine. Not only that, but this calculation also relates to the amount of injected fuel needed for rotating machines.

However, a failed/contaminated mass flow sensor could lead to miscalculation. And it probably causes many additional damages over time. As a solution, replacement is always a must to fix these problems. Thus, mechanics often choose to replace the new ones. Before learning about how to change a mass air flow sensor, what to do after replacing mass air flow sensor?

What To Do After Replacing Mass Air Flow Sensor?

Disconnect The Battery

When you get the mass air flow sensor installation done, the process has not finished yet. Instead, it needs several additional steps for a complete replacement.

After changing a mass air flow sensor, you should disconnect it from the car battery for around 15 minutes. It is not the same as how to disconnect mass air flow sensor. You can follow the steps as below.

  1. Turn the engine off. No one can disconnect the battery without doing this step. Also, we suggest using some safety equipment such as goggles and gloves.
  2. Find the negative terminal of the battery. If you find it difficult, let’s ask a mechanic for a favor. He will help to determine the exact location.
  3. Use a wrench to loosen the negative terminal nut.
  4. Remove the negative connecting point.
  5. Repeat the process with the positive terminal of the battery.
  6. Disconnect the battery. Although the battery gets completely disconnected at this point, you should remove it from the tray. The additional step helps to see whether the battery needs a replacement.


So, what happens if you disconnect mass air flow sensor?

The disconnection helps to reset the factory setting and remove old parameters. At the same time, it starts recording the new data with the new replacement. If you have more questions after these steps, give us a call today at The Callahan Automotive