Mass airflow sensor Analysis
How to know mass airflow sensor is faulty in a car
The following are the symptoms of a bad mass airflow sensor:
- Poor fuel economy
- Car stalling and hesitation while accelerating
- Unstable rev counter
- check light always on
- Hard starting when cold
- Abnormal engine sound (loud noise)
- Engine frequently trip off.
In some situations, mass airflow sensor begins to fail due to contamination caused due to oil or dirt entering the sensor. In both cases, if the mass airflow sensor becomes dirty, the fix is to clean it or replace it.