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1998 Ford F-150 Lariat 5.4L MIL Lamp on, Running rich
Posted to Ford Driveability on 9/10/2019 22 Replies

Customer brought vehicle in stating check engine light is on. Found codes p0172 and p0175 stored in pcm. Fuel trims pegged at about -20% on both banks. Whenever driving vehicle fuel trims will go slightly positive about +5-10% on both banks. But whenever y...

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  Related Documents & Media  1998 Ford F-150 Lariat

 
Message Closed w/FIX

car Vehicle Data

1998 Ford F-150 Lariat

VIN 1FTRX18LXW
Engine5.4 L / 8 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection / P0172 P0175 RUNNING RICH
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, Running Rich
OccursIdle

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)
Message Closed w/FIX

car Vehicle Data

1998 Ford F-150 Lariat

VIN 1FTRX18LXW
Engine5.4 L / 8 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection / P0172 P0175 RUNNING RICH
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, Running Rich
OccursIdle

Trouble Codes

P0172Fuel System Too Rich (Bank 1)
P0175Fuel System Too Lean (Bank 2)