Engine-Codes - Generic - P0101

P0101 Code - Mass or Volume Air Flow Circuit Range/Performance Problem

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P0101 code possible causes

  • Faulty mass air flow sensor
  • Intake air leaks
  • Dirty mass air flow sensor
  • Dirty mass air filter
  • Mass air flow sensor harness is open or shorted
  • Mass air flow sensor circuit poor electrical connection

|How is the P0101 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0101 code tech notes

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the Mass Air Flow (MAF) sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replace the mass air flow sensor.









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|What is the cost to diagnose the P0101 code

Labor: 1.0

The cost to diagnose the P0101 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0101 code detected?

- A high voltage from the sensor is sent to Engine Control Module (ECM) under light load driving condition.
- A low voltage from the sensor is sent to ECM

|What are P0101 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine stall
  • Engine running rough
  • Excessive fuel consumption
  • Excessive smoke

|What is P0101 code meaning?

The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).
The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.

*Sensor design may vary for your model and year

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|P0101 code information for specific makes

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