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1996 Mercury Cougar 3.8L MIL Lamp on, po 171
Posted to Ford Driveability on 4/13/1999

replaced o2 and reset engine light. car cane back about a week later w/ same code check for vacuum leaks and none were found..especially around the intake plenum. emission levels are good. checked cat. conv. and temp is fine. during checking mitchel...

 
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car Vehicle Data

1996 Mercury Cougar

VIN 1FAP52UL95
Engine3.8 L / 6 cyl
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, Po 171
OccursIntermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
Message Closed

car Vehicle Data

1996 Mercury Cougar

VIN 1FAP52UL95
Engine3.8 L / 6 cyl
EmissionsOBD-II Compliant
SymptomsMIL Lamp on, Po 171
OccursIntermittently

Trouble Codes

P0171Fuel System Too Lean (Bank 1)