Details

• Brand:

  

  

• SKU:

  DY-1161

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

  Motorcraft™ Oxygen Sensor, Sensor Exhaust Gas Oxygen

• Description:

  This genuine Motorcraft oxygen sensor, catalog number DY-1161, is the lower, downstream heated exhaust gas oxygen sensor mounted after the catalytic converter on 2011-2014 Ford F-150 trucks. In this position it monitors catalytic-converter efficiency by comparing the oxygen content of the post-catalyst exhaust with the signal from the upstream sensor, sending a voltage feedback signal that the powertrain control module uses to verify the catalyst is working and to fine-tune long-term fuel trims. As the sensor ages or is contaminated by oil or coolant, it responds slowly, which commonly triggers the check-engine light with codes such as P0136, P0137, P0138, P0140, P0141, or a P0420 catalyst-efficiency code, and drivers may notice reduced fuel economy, a failed emissions test, and hesitation. Because the element operates in constant exhaust heat, its switching accuracy degrades over time, so replacing it with the correct Motorcraft unit restores accurate catalyst monitoring and proper fuel trim. This is the original-equipment Motorcraft component listed by Ford as the lower exhaust gas oxygen sensor DY-1161, and it uses the factory connector and thread form for a direct fit on the applicable F-150 exhaust. Apply anti-seize to the threads only if the sensor is not pre-coated, keep the sensor tip free of grease and silicone, torque to specification, and clear stored codes after installation. Confirm the lower downstream location and connector against your truck before ordering.

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