What are the guidelines for troubleshooting Oxygen Sensors (O2S) on Ford Explorer Sport Trac?

Before attributing the oxygen sensor to driveability problems, thorough tests should be carried out. The PCM controls the engine air/fuel ratio through the upstream O2S. The downstream O2S is used in the catalyst monitor system. A working O2S needs good connections, air supply, temperature, and unleaded fuel. HO2S faults are detected by the EEC system through trouble codes. This is done by checking O2S signal voltage with a voltmeter which should range from 100 to 900 millivolts for both sensors. Be careful during sensor removal so as not to damage it, get it dirty, or use cleaning solvents. Install an anti-seize compound on the threads before screwing in the sensor. Lifting the vehicle up is part of the removal process, then comes detaching the electrical connector, unscrewing the old sensor using a specialized socket, applying anti-seize compound, tightening a new sensor safely and finally connecting the electrical connector.

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Oxygen O2 Sensor

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5 Oxygen Sensors found

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Ford Explorer Sport Trac Sensor Assembly
Part Number: F85Z-9G444-BA
- Other Name: Sensor Assy
- Position: Driver Side
$31.83 MSRP: $43.49
You Save: $11.66 (27%)

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Fits the following Vehicles:
2007-2010 Ford Explorer Sport Trac | 6 Cyl 4.0L SOHC EFI, 8 Cyl 4.6L | 5-Speed Automatic Transmission 5R55S, 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Sport Trac Sensor - Hego
Part Number: XL3Z-9F472-AA
- Position: Driver Side
$68.53 MSRP: $113.27
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Fits the following Vehicles:
2007-2010 Ford Explorer Sport Trac | 6 Cyl 4.0L SOHC EFI, 8 Cyl 4.6L | 5-Speed Automatic Transmission 5R55S, 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Sport Trac Sensor - Exhaust Gas - Oxygen
Part Number: 4L3Z-9G444-AA
- Other Name: Oxygen Sensor, Rear Oxygen Sensor
$52.42 MSRP: $104.18
You Save: $51.76 (50%)

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Fits the following Vehicles:
2004-2005 Ford Explorer Sport Trac | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, Four-Wheel Drive, Left Hand Drive, Two-Wheel Drive
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Ford Explorer Sport Trac Sensor - Hego
Part Number: XL3Z-9F472-BA
- Other Name: Front Oxygen Sensor, Oxygen Sensor
- Position: Driver Side & Passenger Side
$35.80 MSRP: $57.09
You Save: $21.29 (38%)

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Fits the following Vehicles:
2001-2005 Ford Explorer Sport Trac | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, Four-Wheel Drive, Left Hand Drive, Two-Wheel Drive
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Ford Explorer Sport Trac Sensor - Hego
Part Number: F85Z-9G444-AB
- Position: Passenger Side
- Replaced by: GU2Z-9G444-A
$50.60 MSRP: $83.64
You Save: $33.04 (40%)

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More Info
Fits the following Vehicles:
2001-2003 Ford Explorer Sport Trac | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, Four-Wheel Drive, Left Hand Drive, Two-Wheel Drive
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Ford Explorer Sport Trac Oxygen Sensors Parts Questions & Answers

Sensor - Hego
F85Z-9G444-AB
Q: What are the guidelines for troubleshooting Oxygen Sensors (O2S) on Ford Explorer Sport Trac?
A: Before attributing the oxygen sensor to driveability problems, thorough tests should be carried out. The PCM controls the engine air/fuel ratio through the upstream O2S. The downstream O2S is used in the catalyst monitor system. A working O2S needs good connections, air supply, temperature, and unleaded fuel. HO2S faults are detected by the EEC system through trouble codes. This is done by checking O2S signal voltage with a voltmeter which should range from 100 to 900 millivolts for both sensors. Be careful during sensor removal so as not to damage it, get it dirty, or use cleaning solvents. Install an anti-seize compound on the threads before screwing in the sensor. Lifting the vehicle up is part of the removal process, then comes detaching the electrical connector, unscrewing the old sensor using a specialized socket, applying anti-seize compound, tightening a new sensor safely and finally connecting the electrical connector.