Mazda Check Engine
 

My Mazda had the check engine light come on and off. P0174 code is what its showing but check engine light does not come on. Not sure what is going on.

It's a system too lean code. Have u had your car tuned up lately? Big things are worn spark plugs, intake leaks, dirty mass air flow sensor, leaking purge solenoid valve.

Hello and welcome to the forums! What kind of car do you have? Model, engine, trans e.t.c. this all helps as each car has its own particular problems ;)