O2 Oxygen Sensor Upstream Downstream for Ford F-150 (2018-2020) 2.7L Turbo

Direct-Fit Upstream & Downstream O2 Sensor Kit for 2018-2020 Ford F-150 (P552)

What it Does: This 4-piece O2 sensor kit restores closed-loop air-fuel metering and catalyst monitoring on 2018-2020 Ford F-150 (P552) 2.7L EcoBoost V6 trucks.

The Stock Ford F-150 Sensor Failure

On the P552 chassis with the twin-turbo 2.7L EcoBoost V6, OEM oxygen sensors endure intense exhaust heat soak during boost and towing. Thermal cycling fractures the internal zirconia element, burns out the heater circuit, and fouls the sensing tip with carbon deposits. As upstream wideband response slows, the PCM miscalculates fuel trims and triggers P0135, P0155, or P0171 codes.

Common Symptoms of a Failing OEM O2 Sensor

• Check Engine Light / DTCs: Triggers P0135, P0155, or P0420 from open heater circuits or sluggish lambda switching.
• Erratic Fuel Trims: Skewed air-fuel feedback causes rough idle and hesitation under boost.
• Fuel Economy Drop: Delayed closed-loop operation increases fuel consumption and causes failed emissions tests.

The Direct-Fit Matched O2 Sensor Solution

Replacing all four sensors as a matched set eliminates bank-to-bank response lag on your 2.7L EcoBoost V6. Each sensor uses a laser-welded stainless housing, high-temperature ceramic element, and OEM-spec heater resistance matching 234-5173, 234-5174, and 234-8050. Factory weatherproof connectors and OEM-threaded bodies allow plug-and-play installation directly into stock exhaust bungs without cutting or splicing.

What's Included

• 2 Upstream Oxygen Sensors
• 2 Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2018-2020 Ford F-150 2.7L Turbo

Frequently Asked Questions & Fitment Warnings

Does this fit the P552 F-150?

Yes. Direct fit for 2018-2020 Ford F-150 2.7L EcoBoost V6 models. Excludes 3.3L, 3.5L, 3.0L diesel, and 5.0L engines.

Will this clear P0135/P0155 heater codes?

Yes. Matched sensors replacing 234-5173, 234-5174, and 234-8050 restore proper heater resistance and closed-loop voltage, clearing sensor-induced faults after reset.

Is wire splicing required during installation?

No. All four units feature OEM-style locking plugs and direct-thread bungs for straightforward bolt-in installation.

The Ford Heavy-Duty Standard

Built to withstand twin-turbo exhaust temperatures during heavy towing and hauling on the P552 platform. Maintain accurate closed-loop fueling and dependable thermal durability.