{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ford-explorer-sport-trac-2001-2010-4-0l-4-6l","title":"O2 Oxygen Sensor Upstream Downstream for Ford Explorer Sport Trac (2001-2010) 4.0L, 4.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Set for 2001-2010 Ford Explorer Sport Trac (U152 \/ U251)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece direct-fit O2 sensor set replaces degraded upstream and downstream exhaust probes on the 2001-2010 Ford Explorer Sport Trac to re-establish accurate stoichiometric air-fuel feedback and resolve catalyst efficiency fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Explorer Sport Trac Exhaust Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended operating cycles, factory exhaust sensors succumb to silicone fouling, carbon buildup, and sustained thermal stress within the catalytic converter downpipes. On the \u003cstrong\u003eU152\u003c\/strong\u003e and \u003cstrong\u003eU251\u003c\/strong\u003e platforms, aging zirconia thimbles lose electrochemical responsiveness, causing sluggish switching rates between rich and lean states. This sensor latency forces the powertrain control module into skewed long-term fuel trim corrections, inducing severe fuel dilution, unstable idle oscillation, elevated emissions, and stubborn diagnostic trouble codes including \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0161\u003c\/strong\u003e, \u003cstrong\u003eP0420\u003c\/strong\u003e, and \u003cstrong\u003eP0430\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-heat duty cycles, these replacement sensors feature rapid-fire internal ceramic heating elements designed to reach operational closed-loop temperatures within seconds of cold start. Double-laser welded 304 stainless steel housings isolate internal platinum-doped sensing elements from moisture, road salts, and exhaust soot contamination. Each probe matches OEM wire harness gauge, heat shielding, and terminal lock pins to allow direct connection to the factory loom without wire splicing. High-tolerance M18x1.5 threads ensure positive mechanical sealing against exhaust bungs to prevent pre-catalyst atmospheric oxygen ingress.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Upstream Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2 Downstream Oxygen Sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2001-2010 Ford Explorer Sport Trac\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e4.0L Cologne V6, 4.6L Modular V8 \/ U152, U251\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e210-292 hp \/ 254-300 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e234-4001, 234-4046, 234-4070, 234-4071, 234-4127, 234-4401, 22013, 22016, 22060, 22071, 22500, 22501\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001-2010 Ford Explorer Sport Trac 4.0L V6\u003c\/li\u003e\n  \u003cli\u003e2007-2010 Ford Explorer Sport Trac 4.6L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the U152 and U251 Explorer Sport Trac?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2001-2010 Ford Explorer Sport Trac equipped with the \u003cstrong\u003e4.0L Cologne\u003c\/strong\u003e V6 and \u003cstrong\u003e4.6L Modular\u003c\/strong\u003e V8 engines across all factory drive configurations.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to flash the ECU or perform a tune after installation?\u003c\/h4\u003e\n\u003cp\u003eNo aftermarket tune is needed; simply clear your stored DTC codes and cycle the ignition so the vehicle's engine computer resets adaptive fuel trims with fresh baseline signals.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eHeavy hauling and off-road work require accurate fueling data under high load demands. Replacing all four exhaust oxygen sensors at the same service interval ensures steady closed-loop management, protecting catalytic bricks from raw fuel washout while pulling payloads or traversing steep trail grades.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67907887595768,"sku":"DS-EQVBD3KVZ","price":102.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-ford-explorer-sport-trac-2001-2010-4-0l-4-6l-1.jpg?v=1793381285","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-ford-explorer-sport-trac-2001-2010-4-0l-4-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}