{"product_id":"oxygen-sensors-for-jeep-wrangler-2001-2006-4-0l-upstream-downstream","title":"Oxygen Sensors for Jeep Wrangler (2001-2006) 4.0L Upstream \u0026 Downstream","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Replacement Oxygen Sensors for 2001-2006 Jeep Wrangler (TJ)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Oxygen Sensors for the 2001-2006 Wrangler monitor exhaust stream stoichiometry and catalytic efficiency to optimize air-fuel ratios and restore factory engine management performance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jeep Wrangler Exhaust Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOn the \u003cstrong\u003eJeep TJ\u003c\/strong\u003e platform, the factory zirconia oxygen sensor thimbles inevitably degrade from thousands of thermal cycles, silica exposure, and oil vapor blow-by common to high-mileage inline-six powerplants. As these sensors age, their switching response times lag significantly between rich and lean states. This signal latency causes the PCM to run sluggish open-loop calculations or inaccurate closed-loop fuel trims, resulting in rich-running conditions, unburned hydrocarbon buildup, rough idle, fouled spark plugs, failed emissions tests, and persistent diagnostic trouble codes including \u003cstrong\u003eP0130\u003c\/strong\u003e through \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\u003eThis comprehensive 4-sensor replacement set features precision-calibrated ceramic planar sensing elements and internal fast-acting ceramic heaters that achieve operating temperatures within seconds. Housed in robust 304 stainless steel shells, these units resist thread galling, thermal shock, and off-road debris impingement. Each sensor features factory-matched wire lengths, high-temperature silicone lead jackets, pre-installed water-tight OE terminal connectors, and factory M18x1.5 thread pitches. This ensures seamless plug-and-play installation without wire splicing, restoring instantaneous stoichiometric feedback, trimming downstream catalyst monitoring, and maximizing fuel economy across both exhaust banks.\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;\"\u003e2001-2006 Jeep Wrangler\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;\"\u003eAMC 4.0L I6 \/ TJ\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;\"\u003e190 hp \/ 235 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;\"\u003e234-4029, 234-4030, 234-4228, 234-4749\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\u003e2001-2006 Jeep Wrangler 4.0L I6 (TJ \/ LJ Unlimited)\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 TJ Wrangler?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2001-2006 Jeep Wrangler equipped with the \u003cstrong\u003eAMC 4.0L I6\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eWhat precautions should be taken when installing these sensors?\u003c\/h4\u003e\n\u003cp\u003eApply high-temperature anti-seize exclusively to the external threads while ensuring the sensor tip remains completely uncontaminated, and route harnesses clear of hot exhaust runners.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jeep Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the rigorous demands of backcountry rock crawling and long-distance towing, these oxygen sensors deliver stable signal fidelity to endure the vibrations, water crossings, and thermal extremes inherent to the Wrangler platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67895997235448,"sku":"DS-EHMW0BYJW","price":92.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/oxygen-sensors-for-jeep-wrangler-2001-2006-4-0l-upstream-downstream-1.jpg?v=1793290662","url":"https:\/\/performancechiptuning.com\/products\/oxygen-sensors-for-jeep-wrangler-2001-2006-4-0l-upstream-downstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}