{"product_id":"o2-oxygen-sensor-upstream-downstream-for-ram-2500-2011-2018-5-7l-6-4l","title":"O2 Oxygen Sensor Upstream Downstream for Ram 2500 (2011-2018) 5.7L, 6.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Upstream and Downstream Set of 4 for 2011-2018 Ram 2500 (DJ)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The O2 Oxygen Sensor Upstream and Downstream Set replaces deteriorated exhaust gas sensors on the 2011-2018 Ram 2500 to restore precise closed-loop fuel trims, resolve diagnostic trouble codes, and ensure optimal catalytic efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ram 2500 Sensor Degradation and Contamination\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on the heavy-duty \u003cstrong\u003eRam 2500 DJ\u003c\/strong\u003e platform undergo extreme thermal cycling and sustained high-heat exposure from heavy towing duties. Over continuous mileage, unburned hydrocarbons, sulfur compounds, and carbon particulate progressively foul the internal ceramic sensing elements and planar zirconia thimbles. This contamination causes signal latency, slow switching speeds, and biased output voltages, forcing the powertrain control module (PCM) into rich or lean fuel trim offsets. The consequence is erratic idle, delayed throttle response, reduced fuel economy, and persistent diagnostic trouble codes like \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\u003eThis comprehensive 4-piece sensor package provides factory-matched replacement units for both pre-catalytic (upstream) air-fuel monitoring and post-catalytic (downstream) system diagnostics. Built with rugged stainless-steel shells, high-density porous ceramic filters, and double laser-welded protection tubes, each sensor delivers rapid response rates and immune-level resistance to thermal shock. Factory-molded weather-pack connectors, precise wire harness lengths, and pre-applied anti-seize coating guarantee plug-and-play installation without wire splicing, restoring true factory stoich mapping under severe operating loads.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Upstream Oxygen Sensors (Pre-Catalytic)\u003c\/li\u003e\n  \u003cli\u003e2 Downstream Oxygen Sensors (Post-Catalytic)\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: solid font-size: min-width:\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;\"\u003e2011-2018 Ram 2500\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;\"\u003e5.7L \/ 6.4L HEMI \/ DJ\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;\"\u003e383-410 hp \/ 400-429 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;\"\u003e\n\u003cstrong\u003e234-4030\u003c\/strong\u003e, \u003cstrong\u003e234-4588\u003c\/strong\u003e, \u003cstrong\u003e234-4593\u003c\/strong\u003e, \u003cstrong\u003e234-4594\u003c\/strong\u003e, \u003cstrong\u003e234-4598\u003c\/strong\u003e, \u003cstrong\u003e234-4653\u003c\/strong\u003e, \u003cstrong\u003e234-4749\u003c\/strong\u003e, \u003cstrong\u003e234-4217\u003c\/strong\u003e, \u003cstrong\u003e234-4228\u003c\/strong\u003e, \u003cstrong\u003e234-4229\u003c\/strong\u003e, \u003cstrong\u003e234-4232\u003c\/strong\u003e, \u003cstrong\u003e234-4587\u003c\/strong\u003e\n\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\u003e2011-2018 Ram 2500 5.7L V8 HEMI\u003c\/li\u003e\n  \u003cli\u003e2014-2018 Ram 2500 6.4L V8 HEMI\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 DJ 2500?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2011-2018 Ram 2500 equipped with the \u003cstrong\u003e5.7L HEMI\u003c\/strong\u003e or \u003cstrong\u003e6.4L HEMI\u003c\/strong\u003e gas engines. \u003cstrong\u003eThis kit does not fit 6.7L Cummins Turbo Diesel models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWhy should upstream and downstream oxygen sensors be replaced at the same time?\u003c\/h4\u003e\n\u003cp\u003eOxygen sensors degrade at parallel operational intervals; renewing all four sensors simultaneously establishes uniform voltage thresholds, stabilizes fuel trims, and prevents secondary DTC triggers.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ram Heavy-Duty Towing Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to endure the grueling exhaust gas temperatures generated under heavy towing and long-haul commercial loads, these sensors restore uncompromised durability and fuel calibration to keep your heavy-duty truck operating at peak pulling performance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67910025511160,"sku":"DS-EC5HOOK0I","price":104.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-15464674001144-main-clean.jpg?v=1793395747","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-ram-2500-2011-2018-5-7l-6-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}