Oxygen Sensors for Ford F-150 (2017-2020) 3.5L Turbo Upstream & Downstream

Direct-Fit Oxygen Sensor Set for 2017-2020 Ford F-150 (P552)

What it Does: The Oxygen Sensor Set replaces fouled or degrading factory lambda sensors on the 2017-2020 Ford F-150 to restore closed-loop fuel trim accuracy and maintain target air-fuel ratios across both cylinder banks.

The Stock Ford F-150 Sensor Degradation & Carbon Contamination

The twin-turbocharged 3.5L EcoBoost engine operates under high thermal stress and intense exhaust backpressure. Over time, soot from dual-injection direct fuel delivery and unburnt hydrocarbons coat the ceramic zirconia sensing elements of the stock lambda probes. This causes thermal shock degradation, sluggish switching frequencies, and skewed short-term fuel trims (STFT), ultimately leading to unmetered over-fueling, failed emissions compliance, catalyst overheating, and stubborn P0130-P0161 diagnostic trouble codes.

The Engineering Solution

Engineered for high-temperature exhaust environments, this 4-piece oxygen sensor replacement kit utilizes heavy-gauge stainless steel housings that resist galvanic corrosion and exhaust thermal cycling. The upstream wideband sensors feature precision planar zirconia elements with internal heaters for rapid closed-loop activation, while the downstream post-cat sensors monitor catalytic efficiency with factory-calibrated switching thresholds. Each unit is equipped with OEM-spec pin terminals, pre-loomed heat-shielded wiring harnesses, and application-specific locking connectors to eliminate signal noise and harness splicing.

What's Included

• 1 x Upstream Left Oxygen Sensor (5-Wire, 234-5174)
• 1 x Upstream Right Oxygen Sensor (5-Wire, 234-5713)
• 2 x Downstream Oxygen Sensors (4-Wire, 234-8017 / 234-4961)

Technical Specifications

Compatibility

• 2017-2020 Ford F-150 3.5L Turbo V6 (XL, XLT, Lariat, King Ranch, Platinum, Limited)

Frequently Asked Questions & Fitment Warnings

Does this fit the P552 F-150?

Yes, this is a direct fit for the 2017-2020 Ford F-150 equipped with the 3.5L EcoBoost engine. Does not fit 2.7L EcoBoost, 3.3L Duratec, or 5.0L Coyote V8 engine configurations.

Do these sensors require wire splicing or ECU recalibration during installation?

No, these sensors feature factory-style terminal plugs for direct plug-in operation without wire modification, though performing an ECU KAM (Keep Alive Memory) reset after install is recommended to clear learned fuel trims.

The Ford Towing Standard

Maintain consistent stoichiometric control under severe towing loads and high manifold boost pressures with accurate, matched cross-bank oxygen metering built to endure heavy-duty truck cycles.