{"product_id":"o2-oxygen-sensor-upstream-downstream-for-cadillac-escalade-2015-2018-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for Cadillac Escalade (2015-2018) 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Complete Kit for 2015-2018 Cadillac Escalade (K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete 4-piece oxygen sensor kit replaces degraded factory upstream and downstream sensors on the 2015-2018 Escalade to restore precise air-fuel ratio monitoring, correct fuel trim imbalances, and clear catalytic converter diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Cadillac Escalade Sensor Contamination \u0026amp; Degradation\u003c\/h3\u003e\n\u003cp\u003eHigh-mileage \u003cstrong\u003eL86\u003c\/strong\u003e direct-injected engines produce carbon particulate, oil vapor blow-by, and severe thermal cycles that foul the factory zirconia sensing elements over time. As aging upstream wideband and downstream narrowband sensors experience silica poisoning and thermal exhaustion, heater circuit response slows significantly. This degradation forces the engine control module into rich open-loop fuel enrichment, causing degraded fuel economy, rough idle, fouled spark plugs, and common CEL fault codes like P0135, P0141, and P0420.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-piece replacement package incorporates fast-acting ceramic planar elements and integrated heating circuits to achieve closed-loop closed-circuit operating temperature within seconds of a cold start. Constructed with double-protection 304 stainless steel housings, laser-welded bodies, and pre-applied high-temperature anti-seize threads, these sensors block environmental contamination and soot intrusion. Swapping both upstream pre-cat and downstream post-cat positions concurrently eliminates signal cross-drift and maintains accurate stoichiometric feedback across all banks.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x 234-4940 Oxygen Sensors (Direct-fit connectors)\u003c\/li\u003e\n  \u003cli\u003e2 x 234-4974 Oxygen Sensors (Direct-fit connectors)\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;\"\u003e2015-2018 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 EcoTec3 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;\"\u003e420 hp \/ 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\u003e2015-2018 Cadillac Escalade Base 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2015-2018 Cadillac Escalade Luxury 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2015-2018 Cadillac Escalade Premium \/ Premium Luxury 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2015-2018 Cadillac Escalade Platinum 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2015-2018 Cadillac Escalade ESV 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 K2XX Escalade?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2015-2018 Cadillac Escalade equipped with the \u003cstrong\u003e6.2L L86\u003c\/strong\u003e engine. Verify engine displacement prior to ordering, as this kit is not configured for non-6.2L applications.\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 harnesses and pin-compatible connectors for direct plug-and-play installation without wire modification or calibration re-flashes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Cadillac Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle the high-heat exhaust flow demands of full-size towing and continuous highway hauling, this sensor set ensures durable operation and consistent fueling accuracy under maximum vehicle payloads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551254413560,"sku":"DS-E0LJ0CD6O","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-2015-2018-6-2l-1.jpg?v=1790794162","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-cadillac-escalade-2015-2018-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}