2015–2020 Ford F-150

2015-2020 Ford F-150 - Upstream O2 Oxygen Sensor Replacement

By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026

🔧🔧 Moderate 1-2 hours $105 DIY

Save $445 by doing it yourself! Shop cost: $550

Quick answer: Upstream O2 Oxygen Sensor Replacement on a 2015–2020 Ford F-150 is rated Moderate and takes about 1-2 hours. You'll need 6 tools for this job, and parts cost about $105. This guide walks you through the full job step by step, including the mistakes to avoid.

Quick Video Tutorial

Parts You Need

Total Cost

$105.00

Part Name	Part Number	Price	Buy
Upstream Oxygen Sensor	TRQ OSA61817	$100.00	Amazon
Anti-Seize Lubricant	Permatex 80078	$5.00	Amazon

About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

Identify which O2 sensor and cool the exhaust

Confirm whether you are replacing an upstream (pre-cat) or downstream (post-cat) sensor and match the part to that location on the 2015-2020 Ford F-150. Wear gloves and eye protection; raise and support the 2015-2020 Ford F-150 if underbody access is required.

Disconnect the sensor connector

Trace the sensor pigtail to its connector — often clipped to the frame, valve cover, or transmission tunnel. Unplug it and free any harness clips so the lead can rotate with the sensor during removal.

Remove the old sensor

Use an oxygen-sensor socket or appropriate wrench. Apply penetrating oil if seized and allow it to soak; heat carefully only if needed and safe. Turn the sensor out — avoid damaging nearby wires, heat shields, or catalytic-converter threads.

🔧 Mechanic's note — Ray Delgado

I soak the F-150 upstream O2 sensor with penetrating oil the night before — exhaust threads seize like nothing else. I have stripped an O2 bung by rushing, and the overnight soak is how I avoid doing it again.

Prepare the new sensor

Compare thread pitch and connector to the old unit. Most new sensors include anti-seize on the threads — do not get anti-seize on the tip or protection tube. Never clean or paint the sensing element.

Install and torque the new sensor

Thread the new sensor by hand to avoid cross-threading, then torque to the specification (often around 30–40 N·m — use the value for this vehicle). Route the pigtail away from hot exhaust and moving parts, and reconnect the connector until it locks.

Clear codes and verify fuel trim

Lower the 2015-2020 Ford F-150 if raised. Start the engine and confirm the heater circuit runs with no immediate exhaust leak at the bung. Clear related codes with a scan tool and road-test; monitors may need a complete drive cycle before readiness returns.

🔧 Mechanic's note — Tom Becker

I clear the F-150 codes and drive it, then I recheck the upstream O2 sensor harness — exhaust heat cycles expand everything around it, and I have had a connector back out just enough to throw the code again.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

• Not disconnecting the battery before starting the repair
• Using excessive force when removing the old sensor, potentially damaging the wiring
• Failing to apply anti-seize lubricant to the new sensor, leading to future difficulties during removal

Tools You'll Need

Oxygen Sensor Socket Socket Wrench Torque Wrench Jack and Jack Stands Wheel Chocks Safety Glasses Gloves Penetrating Oil

Torque Specifications

Critical specs — don't skip these!

Bolt	Nm	ft-lbs
O2 sensor	45	33

Important: Use a calibrated torque wrench. Over-tightening can strip threads. Under-tightening can loosen parts.

⚠️ Safety First!

• Ensure the vehicle is securely elevated and supported before working underneath it
• Wear safety glasses and gloves to protect against debris and hot components
• Allow the engine to cool before starting the repair to prevent burns