Engine System Service Light comes and goes - I got checked at Autozone and got P0101 code. Cleaned the mass flow sensor light went away then came back. Another observation when temperature rises light goes away then come back when temperature dips. Thinking to change mass airflow sensor as a b=next step.......ANY ADVICE PLEASE ??

 

Start by cleaning the throttle body. This requires removal of the unit and cleaning both sides.

Often an airflow code is caused by obstruction in the throttle butterfly.

 

check the engine coolant temp sensor?