{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-1500-2014-2017-4-3l-5-3l-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Silverado 1500 (2014-2017) 4.3L, 5.3L, 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit 4-Piece Upstream and Downstream O2 Sensor Kit for 2014-2017 Chevrolet Silverado (K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gas oxygen concentrations on the 2014-2017 Silverado to maintain closed-loop fuel trim precision and prevent catalytic converter fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Oxygen Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eK2XX\u003c\/strong\u003e platform suffer from severe thermal cycling, silica poisoning, and soot accumulation over extended mileage. As the zirconia solid electrolyte degrades, sensor response latency increases, causing slow rich-to-lean switching. This sluggish closed-loop signal feedback causes the engine control module (ECM) to miscalculate stoichiometric air-fuel targets on direct-injected \u003cstrong\u003eEcoTec3\u003c\/strong\u003e engines, leading to unburned hydrocarbons, reduced fuel economy, spark plug fouling, and diagnostic trouble codes such as P0131, P0137, P0420, or P0430.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-piece complete replacement kit features planar zirconia ceramic elements protected by dual-layer 304 stainless steel shielding to resist thermal shock and exhaust particulate contamination. Engineered with high-temp PTFE-insulated lead wiring and internal ceramic heaters, these sensors achieve rapid light-off operational temperatures within seconds of cold starts. Factory-pinned, water-sealed automotive connectors and pre-coated anti-seize threads ensure proper closed-loop lambda control and direct drop-in integration to replace OEM units \u003cstrong\u003e12657188\u003c\/strong\u003e and \u003cstrong\u003e12659516\u003c\/strong\u003e without wire splicing.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x 234-4940 Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2 x 234-4974 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;\"\u003e2014-2017 Chevrolet Silverado 1500\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;\"\u003eEcoTec3 (4.3L LV3, 5.3L L83, 6.2L L86) \/ K2XX\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;\"\u003e285-420 hp \/ 305-460 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;\"\u003e234-4940, 234-4974, 12657188, 12659516, 234-8081, 234-8088, 12627139, 12643707, 12643708, 12645561, 12655677, 12655678, 12661898, 12665162, 12666612, 12666673, 55569902, 21074, 21075, 21579, 21581, 234-4763, 2344763, 2344940, 2344974, 234-8052, 2348052\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\u003e2014-2017 Chevrolet Silverado 1500 4.3L V6 (LV3)\u003c\/li\u003e\n  \u003cli\u003e2014-2017 Chevrolet Silverado 1500 5.3L V8 (L83)\u003c\/li\u003e\n  \u003cli\u003e2014-2017 Chevrolet Silverado 1500 6.2L V8 (L86)\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 K2XX Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2014-2017 Chevrolet Silverado equipped with the \u003cstrong\u003eLV3\u003c\/strong\u003e, \u003cstrong\u003eL83\u003c\/strong\u003e, or \u003cstrong\u003eL86\u003c\/strong\u003e EcoTec3 engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire splicing or aftermarket tuning?\u003c\/h4\u003e\n\u003cp\u003eNo, these sensors feature factory-style direct-fit connectors and pre-calibrated resistance ranges, requiring no PCM recalibration or harness modification.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle sustained high-load towing and harsh exhaust gas temperatures, this sensor kit restores precise air-fuel ratio feedback to maintain maximum payload efficiency and heavy-duty drivetrain durability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551255494904,"sku":"DS-EHXUQF0AO","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-1500-2014-2017-4-3l-5-3l-6-2l-1.jpg?v=1790794192","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-1500-2014-2017-4-3l-5-3l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}