O2 Oxygen Sensor Upstream Downstream for Ford F-250 Super Duty (2017-2020) 6.2L

Direct-Fit O2 Sensor Kit for 2017-2020 Ford F-250 (P558)

What it Does: This four-sensor kit restores closed-loop air-fuel ratio and catalyst monitoring on the 2017-2020 Ford F-250 P558 6.2L Boss V8.

The Stock Ford F-250 Sensor Failure

Factory oxygen sensors on the P558 F-250 endure severe towing heat soak and thermal cycling inside the exhaust manifolds. Over time, carbon soot, moisture, and silica fouling degrade the zirconia element and spike internal heater resistance. When the 6.2L Boss V8 ECU detects sluggish voltage switching or heater circuit burnout, it logs P0135, P0155, or P0171/P0174 codes and forces rich open-loop fueling.

Common Symptoms of a Failing OEM Oxygen Sensor

• Check Engine Light / DTCs: Logs P0135, P0155, or P0420/P0430 from heater burnout or slow switching.
• Erratic Fuel Trims: Delayed sensor feedback causes rough idle and hesitation under load.
• High Fuel Usage: Open-loop default fueling increases consumption and risks catalyst overheating.

The Direct-Fit Upstream & Downstream O2 Solution

Replacing all four sensors as a matched set restores balanced Bank 1 and Bank 2 feedback across the 6.2L Boss V8 exhaust. Each unit pairs a laser-welded stainless housing with a ceramic zirconia core and fast-response heater for rapid closed-loop activation. Engineered to OEM 234-5097 and 234-4576 specifications, these direct-fit sensors include factory weatherpack connectors that plug straight into OEM chassis harnesses without splicing.

What's Included

• 2 Upstream Oxygen Sensors (234-5097)
• 2 Downstream Oxygen Sensors (234-4576)

Technical Specifications

Compatibility

• 2017-2020 Ford F-250 Super Duty 6.2L V8 (2 Upstream, 2 Downstream)
• Note: 2012-2016 F-250 6.2L and 2012-2020 F-350 6.2L use separate listings; confirm engine before ordering

Frequently Asked Questions & Fitment Warnings

Does this fit the P558 F-250?

Yes. Direct fit for the 2017-2020 Ford F-250 6.2L Boss V8. Excludes 6.7L Power Stroke, 7.3L V8, and 2012-2016 models.

Will this clear P0135/P0155 codes?

Yes. Fresh 234-5097 and 234-4576 sensors restore proper heater resistance and switching once cleared.

Are factory connectors included for installation?

Yes. Pre-wired OEM plugs ensure plug-and-play installation after cleaning exhaust bung threads.

The Ford Heavy-Duty Standard

Built for sustained towing heat on the P558 chassis, this matched sensor kit maintains accurate fueling and reliable emissions compliance.