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
– 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
Tech description
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.
When is the obd code mean?
The P0101 code is set when the Powertrain Control Module (PCM) detects that the Mass Air Flow (MAF) sensor frequency is below a predetermined value.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine stall
– Engine running rough
– Excessive fuel consumption
– Excessive smoke
– Engine stall
– Engine running rough
– Excessive fuel consumption
– Excessive smoke
P0101 CHEVROLET OBD Code Description