• O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L
  • O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L
  • O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L
  • O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L
  • Action Shot: Ford F-150 Driving Fast

O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L

$79.95
$79.95
Free Shipping within USA.
  • Guaranteed Fitment
  • Performance Tested
  • Lifetime Warranty

Want it soon? Order within

I18n Error: Missing interpolation value "end_date" for "Ends on {{ end_date }}"

Direct-Fit 4-Piece Oxygen Sensor Kit for 1997-2008 Ford F-150 (PN96 / P221)

What it Does: The 4-piece oxygen sensor kit restores factory closed-loop AFR monitoring and catalytic efficiency on the 1997-2008 Ford F-150 to eliminate check engine lights and normalize fuel trim tables.

The Stock Ford F-150 Sensor Degradation & Thermal Fatigue

Factory O2 sensors on high-mileage PN96 and P221 platforms degrade through continuous exhaust gas contamination, silica poisoning, and repeated thermal shock. As the internal porous ceramic element fouls, signal response slows, causing the PCM to over-compensate with rich or lean fuel trims. This latency leads to unburned hydrocarbons overheating catalytic converters, fouled spark plugs, and recurring diagnostic trouble codes such as P0135, P0141, P0171, and P0420.

The Engineering Solution

Engineered to OEM switching thresholds, these sensors utilize high-grade zirconia solid-electrolyte sensing elements protected by double-layered, laser-welded stainless steel protective sleeves. Integrated fast-acting ceramic internal heaters reduce light-off time, pulling the PCM into closed-loop operation rapidly on cold starts. Direct-fit weather-pack harness connectors prevent signal degradation and eliminate wire splicing.

What's Included

  • 4x Direct-fit Oxygen Sensors (Pre-cat Upstream and Post-cat Downstream configuration)

Technical Specifications

Fitment 1997-2008 Ford F-150
Engine / Chassis 4.2L Essex V6, 4.6L / 5.4L Triton V8 / PN96 / P221
Stock Output 202–300 hp / 252–365 lb-ft
Replaces OEM Part # 234-4402, 234-4403, 234-4609, 234-4610, 234-4870, ES20014, ES20040, ES20064, ES20104, ES20316, ES20318, ES20151, ES20328, SG1801, SG1802, SG1803, SG1806, SG1807, SG1808, SG1813, SG1814, SG726, SG459, 234-4001, 234-4046, 234-4070, 234-4071, 234-4127, 234-4401, 34-4127

Compatibility

  • 1997-2008 Ford F-150 4.2L V6
  • 1997-2008 Ford F-150 4.6L V8
  • 1997-2008 Ford F-150 5.4L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the PN96 / P221 F-150?

Yes, this is a direct fit for the 1997-2008 Ford F-150 equipped with the 4.2L Essex, 4.6L Triton, or 5.4L Triton engine.

Do these sensors require wire cutting or splicing during installation?

No, these are direct-fit units supplied with factory-style locking terminal plugs for plug-and-play installation.

The Ford Towing & Hauling Standard

Maintained stoichiometric balance is vital under heavy payload and towing duty cycles. By replacing worn upstream and downstream oxygen sensors together, you protect the exhaust train from excessive EGTs, safeguard catalytic substrate efficiency, and ensure stable engine performance under heavy load.

Fitment

Make

Ford

Engine Size
  • 4.2L
  • 4.6L
  • 5.4L

Year
  • 1997
  • 1998
  • 1999
  • 2000
  • 2001
  • 2002
  • 2003
  • 2004
  • 2005
  • 2006
  • 2007
  • 2008

Warranty

All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]
O2 Oxygen Sensor Upstream Downstream for Ford F-150 (1997-2008) 4.2L, 4.6L, 5.4L

$79.95