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1999 Ford Explorer Sport 4.0L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on
Posted to Ford Driveability on 2/4/2004 39 Replies

I have a Ford explorer. It originally came in with code P0171(system lean, bank 1)and P0174 (system lean Bank 2). Could not find anything that looked bad, but put 2 new o2 sensors in it. It came back next day with the light back on and the customer complained ...

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  Related Documents & Media  1999 Ford Explorer Sport

 
Message Closed w/FIX

car Vehicle Data

1999 Ford Explorer Sport

VIN 1FMYU24X6X
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp On
OccursIntermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

1999 Ford Explorer Sport

VIN 1FMYU24X6X
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp On
OccursIntermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)