How to test and replace a Mass Air Flow Sensor or MAF Sensor | P0101 P0102 P0103

Today I'll be showing how to test and replace the MAF, or mass air flow sensor, with very basic tools that almost every one of you will already own. Save yourself time and money by following this simple to follow DIY video!

What is a mass air flow sensor, what does the mass air flow sensor do?
The mass air flow sensor is essentially an air meter. The MAF sensor is located between the air filter and the intake manifold of the engine. The mass air flow sensor measures the amount of air entering the engine or the air flow. Based on these real-time inputs, the engine control unit estimates the amount of fuel mass needed to keep air and fuel in balance. Additionally, air density changes with the temperature, pressure, humidity, etc. That is where, again, MAF sensors help.

Trouble codes associated with the MAF sensor:
P0101 - Mass or volume air flow circuit range / performance.
P0102 - Mass or volume air flow circuit low input.
P0103 - Mass or volume air flow circuit high input.
P0172 - System too rich.
P1602 - Control module programming error.
P2096 - Post catalyst fuel trim system too lean.
P2097 - Post catalyst fuel trim system too rich.

What are the symptoms of a bad mass air flow sensor:
- Engine stalls during idling.
- Rough idling or a rough idle.
- Engine does not return to idle.
- Poor acceleration.
- Engine stalls, hesitates or sputters.
- Engine surges or engine surging.
- Spark knock.
- After burning in exhaust system.



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0:00 - Locating the mass air flow sensor
0:58 - Finding the power source for MAF
4:32 - Removing the maf sensor
5:14 - How to test the MAF sensor
8:01 - MAF and Intake air temp sensor

Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

Publication, reproduction or distribution of this film is strictly prohibited.

Carsntoys

[uphill]

Is there a scan tool that tells you which part is bad? Even though if there’s no check engine on?

[miriamvivo]

Depends on brand. AEM is agood brand so is injen brand . Some cars have to be tuned professinally at a tuning shop.

[gransergranser]

U back probed it ? How are we going to do that with a multimeter

[AsapGhostBoo]

I have an aftermarket intake can that wreck the sensor?