O2 Oxygen Sensor Upstream Downstream for Ford F-350 Super Duty (2012-2020) 6.2L

Direct-Fit O2 Sensor Kit for 2012-2020 Ford F-350 (P473/P558)

What it Does: This 4-piece oxygen sensor kit monitors pre- and post-catalyst exhaust oxygen on the 2012-2020 Ford F-350 6.2L Boss V8 for closed-loop fuel control.

The Stock Ford F-350 Sensor Failure

On P473 and P558 Super Duty trucks with the 6.2L Boss V8, heavy towing exhaust heat and moisture condensation cause thermal shock across factory zirconia ceramic sensing elements. Over time, carbon fouling and internal heater circuit burnout degrade voltage switching speed and accuracy. Sluggish upstream signals corrupt fuel trims, triggering P0133, P0135, P0155, or P0171/P0174 codes, while degraded downstream units trip false P0420/P0430 catalyst efficiency faults.

Common Symptoms of a Failing OEM Sensor

• Check Engine Light: Heater or response faults including P0135, P0155, and P0420/P0430.
• Fuel Trim Surge: Stalled voltage causes rough idle and exhaust odor.
• Poor Towing MPG: Open-loop enrichment drops economy and fails emissions.

The Direct-Fit O2 Solution

This matched 4-sensor kit directly replaces OEM part numbers 234-5097 (upstream) and 234-4576 (downstream) to restore factory closed-loop response across both exhaust banks. Each sensor utilizes a high-purity zirconia ceramic element inside a laser-welded stainless steel housing with dual-shielded ports that resist thermal shock and condensate. Factory-spec internal heater windings reach rapid light-off temperatures, while OE-length pigtails and keyed weatherpack connectors ensure plug-and-play installation without splicing.

What's Included

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

Technical Specifications

Compatibility

• 2012-2020 Ford F-350 Super Duty 6.2L V8 (2 Upstream, 2 Downstream)
• 2012-2020 Ford F-250 Super Duty 6.2L V8 (confirm 2012-2016 vs. 2017-2020)

Frequently Asked Questions & Fitment

Does this fit the P473 / P558 F-350?

Yes. Direct fit for the 2012-2020 Ford F-350 with the 6.2L Boss V8. Excludes 6.7L diesel, 6.8L V10, and 7.3L V8.

Will this clear P0135 and P0420/P0430 codes?

Yes, if sensor-related. Replacing 234-5097 and 234-4576 clears heater faults; persistent P0420/P0430 requires catalyst checks.

Are OE connectors included?

Yes. Factory plugs and pre-coated threads torque to 30 lb-ft.

The Ford Heavy-Duty Standard

Built for towing heat, this sensor set restores fuel trim precision on your 6.2L Boss V8, keeping your P473 or P558 code-free.