O2 Oxygen Sensor Upstream Downstream for Lincoln Blackwood (2002-2003) 5.4L
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Direct-Fit Oxygen Sensor Replacement Set for 2002-2003 Lincoln Blackwood (PN96)
What it Does: The oxygen sensor set restores factory air-fuel metering and catalyst monitoring on the 2002-2003 Lincoln Blackwood to eliminate check engine lights and recover lost fuel economy.
The Stock Lincoln Blackwood Sensor Degradation
Over extended heat cycles and mileage, the factory zirconia planar elements inside the PN96 platform oxygen sensors become poisoned by exhaust blow-by, carbon deposits, and fuel additives. Degraded upstream sensors produce lazy switching response times, skewing short-term and long-term fuel trims rich or lean. This thermal aging causes unburnt hydrocarbon wash down, fouled spark plugs, hesitation under load, and diagnostic trouble codes such as P0130, P0150, P0420, and P0430.
The Engineering Solution
This 4-piece replacement set utilizes high-temperature dual-layer ceramic sensing elements housed in corrosion-resistant 304 stainless steel shells. Calibrated internal heaters guarantee rapid closed-loop activation during cold starts to curb cold-cycle emissions. Designed to mate directly to the factory harness with OEM-spec pin-outs, wire leads, and waterproof seals, each sensor threads cleanly into standard M18x1.5 bungs without wire slicing, restoring factory closed-loop stoichiometry and catalyst efficiency tracking.
What's Included
- 2 Upstream Oxygen Sensors (Pre-Catalyst)
- 2 Downstream Oxygen Sensors (Post-Catalyst)
Technical Specifications
| Fitment | 2002-2003 Lincoln Blackwood |
|---|---|
| Engine / Chassis | 5.4L DOHC InTech V8 / PN96 |
| Stock Output | 300 hp / 355 lb-ft |
| Replaces OEM Part # | SG459, 234-4046, 234-4070, 234-4071, 234-4127, 234-4401, 234-4402, SG1801, SG1802, SG1803, SG1806, SG1807 |
Compatibility
- 2002 Lincoln Blackwood Base 5.4L V8 DOHC Gas
- 2003 Lincoln Blackwood Base 5.4L V8 DOHC Gas
Frequently Asked Questions & Fitment Warnings
Does this fit the PN96 Blackwood?
Yes, this is a direct fit for the 2002-2003 Lincoln Blackwood equipped with the 5.4L DOHC InTech engine; verify sensor positions and connectors before mounting.
What are the critical installation precautions for these sensors?
Use a designated slotted O2 sensor socket, apply anti-seize strictly to the threads while avoiding the sensor head, route harness pigtails clear of hot exhaust runners, and clear stored ECM codes after install.
The Lincoln Durability Standard
Engineered to handle sustained exhaust heat and towing duty cycles, these oxygen sensors maintain accurate AFR feedback under load to safeguard engine internals and catalytic converter longevity.
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