Details

• Brand:

  

  

• SKU:

  KB3Z-9G444-C

• Positions: Rear Lower
• Other Names:

  Lower Oxygen Sensor, Sensor Exhaust Gas Oxygen, dy1628

• Description:

  This is a genuine Ford oxygen sensor for the 2019 through 2023 Ford Ranger, serving as the downstream catalyst-monitor sensor in the exhaust system. Mounted after the catalytic converter, this sensor measures the oxygen content of the exhaust stream and reports to the engine control module so it can confirm the converter is working and keep the air-fuel mixture properly trimmed. Accurate readings from this sensor are central to clean emissions, correct fuel delivery, and smooth engine operation. When the sensor degrades or fails, the most common symptom is an illuminated check-engine light with oxygen-sensor or catalyst-efficiency trouble codes, often alongside reduced fuel economy, a rough or hesitant idle, and a failed emissions test. A lazy or dead sensor can also cause the engine to run rich or lean, accelerating wear elsewhere in the exhaust and fuel systems. This part supersedes the earlier KB3Z-9G444-A and KB3Z-9G444-B versions and installs in their place. As a factory Ford sensor it carries the correct connector, thread, and calibration the Ranger control module expects, so it reads accurately right out of the box without the drivability problems common to generic sensors. Installation calls for the right oxygen-sensor socket and a light application of anti-seize on the threads if not already coated, taking care not to contaminate the sensor tip. Buyers searching for this part are usually clearing an emissions code or restoring fuel economy and want the exact OEM sensor for a correct, durable fix that the truck will accept without complaint.

• Replaces:

  dy1481, dy1590, kb3z9g444a, kb3z9g444b

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