Before driving i let the engine warm up for 5 min ish , first quarter of a mile everything is okay after that MPG drops to 2 miles per gallon and as i drive gradually increases to 19 - 21 miles per gallon. Replaced: O2 sensor, MAF, MAP , air filter . Cleaned: throttle body . Can please anyone help me

 

5 minutes at 0 mpg.

 

First 5 min the car is on full STOP in the parking spot , doesn't how any MPG just: - - - - - - - - -

 

so you must be looking at average MPG...what does realtime mpg show? just idling really does suck down the avg mpg, because you are consuming gas, not going anywhere.

a good test would be to get in and just go, then when you get somewhere, just sit and watch the avg mpg go down.

 

real time MPG goes up gradually up to 19 to 19.5 MPG and stays there ,that is after driving 5 - 6 miles

 

next time, after warming up engine, just before start driving, reset fuel eco. Let us know what you will get after driving for few min.