{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-colorado-2015-2016-3-6l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Colorado (2015-2016) 3.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream Oxygen Sensor Kit for 2015-2016 Chevrolet Colorado (GMT 31XX)\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 composition on the 2015-2016 Colorado to restore closed-loop fuel trim accuracy and resolve emissions-related check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Colorado Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eThe direct-injected 3.6L \u003cstrong\u003eLFX\u003c\/strong\u003e V6 operates with tight air-fuel ratio thresholds. Over time, thermal cycling and exhaust deposits foul the factory zirconia sensing elements. When upstream sensors suffer from response lag or heater circuit failure (e.g., DTC P0135, P0155), the ECM relies on default fuel maps, skewing short- and long-term fuel trims (STFT\/LTFT). Meanwhile, worn downstream sensors trigger false catalytic converter efficiency codes (P0420, P0430), leading to increased fuel consumption, elevated emissions, and rough idling under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-piece kit replaces both Bank 1 and Bank 2 upstream and downstream sensors as a matched service set. Built with laser-welded stainless steel bodies, high-temperature ceramic sensing cores, and fast-acting integrated heating elements, these units reach operating temperature rapidly to enable immediate closed-loop ECM metering. Factory-matched harness lengths and OE-pinned weatherproof connectors eliminate splicing, while pre-applied anti-seize simplifies thread engagement in tight exhaust locations.\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: 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;\"\u003e2015-2016 Chevrolet Colorado\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;\"\u003e3.6L LFX V6 \/ GMT 31XX\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;\"\u003e305 hp \/ 269 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;\"\u003eS4-4565, 234-4566, 12590035, 12597449, 12616203, 12634064, 2344818, 12596688, 12634085, 12640453, 1821378J10, 2344259, 2344840\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 Chevrolet Colorado 3.6L V6 (LT, WT, Z71)\u003c\/li\u003e\n  \u003cli\u003e2016 Chevrolet Colorado 3.6L V6 (LT, WT, Z71)\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 GMT 31XX Colorado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2015-2016 Chevrolet Colorado equipped with the 3.6L \u003cstrong\u003eLFX\u003c\/strong\u003e V6 engine. \u003cstrong\u003eDoes not fit 2.5L 4-cylinder or 2.8L Duramax diesel models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to clear ECM adaptations after replacement?\u003c\/h4\u003e\n\u003cp\u003eYes, executing a fuel trim reset or clearing DTCs with an OBD-II scan tool is recommended so the ECM immediately learns fresh lambda values.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Caliber\u003c\/h3\u003e\n\u003cp\u003eMidsize haulers demand reliable closed-loop fueling to sustain power band stability during heavy towing and grade climbing. Installing fresh oxygen sensors ensures the direct-injected V6 preserves steady throttle delivery and optimal fuel economy on and off the job site.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551493390584,"sku":"DS-EZEG2RBCO","price":89.95,"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-colorado-2015-2016-3-6l-1.jpg?v=1790797423","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-colorado-2015-2016-3-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}