Details

• Brand:

  

  

• SKU:

  ML3Z-9G444-A

• Positions: Rear Lower, Rear, Left Lower, Left Rear, Right Lower, Right Rear
• Other Names:

  Lower Oxygen Sensor, Sensor Exhaust Gas Oxygen, dy1576

• Description:

  This genuine Ford oxygen sensor is the downstream, catalyst-monitor sensor on the 21-25 F-150, measuring exhaust oxygen after the catalytic converter so the engine control module can verify converter efficiency and trim fueling. Equivalent to the Motorcraft service sensor, it serves several engine applications across the lineup. A worn or contaminated sensor commonly triggers a check-engine light with catalyst-efficiency or oxygen-sensor codes, causes reduced fuel economy, or produces failed emissions readiness. Because the sensor's signal feeds emissions monitoring, an aged unit that responds slowly should be replaced. Built to factory specification, this sensor matches the original heater circuit, connector and thread so it installs in the original location and reports accurately. Installation should use anti-seize only where Ford specifies, torque to the listed value, and route the harness clear of the exhaust. Fitting the correct Ford oxygen sensor restores accurate catalyst monitoring and proper fuel trim to the F-150, clearing the emissions faults caused by a degraded original sensor.

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