P0101
Powertrain Codes
P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem
Symptoms
- Engine stall - Engine running rough - Excessive fuel consumption - Excessive smoke - Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- Dirty mass air flow sensor - Dirty mass air filter - Mass air flow sensor harness is open or shorted - Mass air flow sensor electrical circuit poor connection - Intake air leaks - Faulty mass air flow sensor
When 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
Tech Notes
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow 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 replaced the mass air flow sensor.
Description
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 acertain 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.
Information For Specific Makes
P0101 ACURA
P0101 AUDI
P0101 CHRYSLER
P0101 DODGE
P0101 FORD
P0101 HONDA
P0101 INFINITI
P0101 ISUZU
P0101 JEEP
P0101 KIA
P0101 LEXUS
P0101 MAZDA
P0101 MITSUBISHI
P0101 NISSAN
P0101 SCION
P0101 SUBARU
P0101 TOYOTA
P0101 VOLKSWAGEN
P0101 JAGUAR