Getting codes...( Autozone diagnostics )...
P0171 - Fuel system too lean ( cylinder bank 1 )
P0174 - Fuel System too lean ( cylinder bank 2 )
P0153 - HO2S-21 ( Bank 2 sensor 1 ) circuit slow response
Multimetered each upstream O2 sensor....each getting 11+ volts, heating element 3.4 ohms resistance and each producing fluctuating voltages from .2 to .80 after 10 minute idle.
Thoroughly cleaned Mass Air Flow ( MAF ) Sensor with CRC cleaner.
Autozone reference says problem most likely a bad MAF for this vehicle.
Ideas????