Join Date: Feb 2001
Location: The Sticks of Central TX
Re: Mass airflow sensor problem
Obdii codes are as follows.
P0171 - Fuel Trim System Lean Bank 1
P0174 - Fuel Trim System Lean Bank 2
These have similar results as the EECIV codes.
Most likely cause of the code is one or more of the following....
Dirty air filter, loose oil dipstick, dirty/defective MAF, dirty injectors, vacuum leak around the intake manifold, a loose vacuum hose, evaporated emmissions purge control valve could have a wire connector disconnected, or possibly bad O2's.