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2004 Ford Freestar SES 3.9L Misfire
Posted to Ford Driveability on 4/22/2015 7 Replies

Have vehicle over time so we've had time to drive it.

Replaced rear O2 sensors (had 7+ ohms heater readings)with 3.4 ohm (measured) OE sensors and this seems to have cured P0141/P0161. In testing for O2 circuit problem we checked wiring/power/shorts/grounds/P...

7 Replies Received (View Replies)

  Related Documents & Media  2004 Ford Freestar SES

 
Message Closed w/FIX

car Vehicle Data

2004 Ford Freestar SES

VIN 2FMZA57624
Engine3.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIntermittently
Misc.California Emmissions

Trouble Codes

P0141Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction
P0161Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Circuit Malfunction
Message Closed w/FIX

car Vehicle Data

2004 Ford Freestar SES

VIN 2FMZA57624
Engine3.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursIntermittently
Misc.California Emmissions

Trouble Codes

P0141Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction
P0161Heated Oxygen Sensor (Bank 2 Sensor 2) Heater Circuit Malfunction