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2007 Ford Mustang 4.0L Excessive Emissions, MIL Lamp on
Posted to Ford Driveability on 6/26/2024 16 Replies

Help! Thanks in advance. I tried smoking the intake system but found no leaks. If I ad propane to the intake the fuel trim will go negative but never correct close to 0, it will stay close to 10 on the LT trim for both banks. I sprayed water around intake ...

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car Vehicle Data

2007 Ford Mustang

VIN 1ZVFT80N67
Engine4.0 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, MIL Lamp On
OccursAlways
Misc.Ad on Stuff K&n Air Filter, Air Tube, Throttle Body, Pypes Exhaust Etc.

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
Open Help Request

car Vehicle Data

2007 Ford Mustang

VIN 1ZVFT80N67
Engine4.0 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, MIL Lamp On
OccursAlways
Misc.Ad on Stuff K&n Air Filter, Air Tube, Throttle Body, Pypes Exhaust Etc.

Trouble Codes

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