{"product_id":"o2-oxygen-sensor-upstream-downstream-for-cadillac-escalade-2008-2014-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for Cadillac Escalade (2008-2014) 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit 4-Piece Oxygen Sensor Kit for 2008-2014 Cadillac Escalade (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece upstream and downstream oxygen sensor kit replaces contaminated factory sensors on the 2008-2014 Cadillac Escalade to restore closed-loop fuel trim accuracy and resolve emissions-related check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Cadillac Escalade Sensor Contamination \u0026amp; Lag\u003c\/h3\u003e\n\u003cp\u003eOver extended mileage, factory heated oxygen sensors on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform suffer from internal ceramic element degradation, thermal shock, and soot accumulation from the high-displacement \u003cstrong\u003e6.2L Vortec\u003c\/strong\u003e V8. When the zirconia sensing core becomes poisoned or the integrated heater circuit fails, sensor switching frequency between lean and rich (0.1V to 0.9V) slows down significantly. This degradation causes the ECM to run excessively rich or lean, resulting in unburned hydrocarbon buildup, lower fuel mileage, catalytic converter overheating, and diagnostic trouble codes such as P0130 through P0161.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive 4-sensor package updates both pre-catalytic (upstream) and post-catalytic (downstream) monitoring positions. Manufactured with high-grade stainless steel housings, dual-layer protective shielding, and fast-acting internal ceramic heating elements, each sensor reaches operating temperature in seconds to deliver instantaneous millivolt feedback to the engine controller. Direct-fit OEM-spec harness plugs eliminate splicing, while pre-treated high-temperature threads prevent galling in exhaust bungs during installation, matching OEM references \u003cstrong\u003e234-4254\u003c\/strong\u003e, \u003cstrong\u003e234-4668\u003c\/strong\u003e, and \u003cstrong\u003e15284\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2x 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;\"\u003e2008-2014 Cadillac Escalade\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;\"\u003e6.2L V8 (L92 \/ L9H \/ L94) \/ GMT900\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;\"\u003e403 hp \/ 417 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;\"\u003e21546, 234-4254, 234-4407, 234-4668, 15284, 2344254, 2344668, ES20013, OS1656, OS2239, OS2240, OS2249, SG1857\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\u003e2008-2014 Cadillac Escalade Base, Luxury, Premium, Platinum 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 Cadillac Escalade ESV 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2013 Cadillac Escalade EXT 6.2L 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 GMT900 Escalade?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2014 Cadillac Escalade equipped with the \u003cstrong\u003e6.2L Vortec (L92, L9H, L94)\u003c\/strong\u003e V8 engine. It does not fit hybrid models or non-6.2L applications.\u003c\/p\u003e\n\n\u003ch4\u003eShould I replace all four O2 sensors at the same time?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing both upstream and downstream sensors in a single service prevents uneven switching latency between new and aged sensors, allowing the PCM to calculate precise catalyst efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Cadillac Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle the high thermal loads of heavy towing, extended idling, and high-output V8 duty cycles, these direct-fit sensors keep your luxury platform running cleanly without unexpected emissions fault codes.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551202214136,"sku":"DS-EKI4ZF4UY","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-cadillac-escalade-2008-2014-6-2l-1.jpg?v=1790793441","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-cadillac-escalade-2008-2014-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}