{"product_id":"o2-oxygen-sensor-upstream-downstream-for-gmc-sonoma-2000-2003-2-2l","title":"O2 Oxygen Sensor Upstream Downstream for GMC Sonoma (2000-2003) 2.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream O2 Sensor Kit for 2000-2003 GMC Sonoma (GMT325)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This upstream and downstream oxygen sensor kit monitors exhaust oxygen on the 2000-2003 GMC Sonoma \u003cstrong\u003eGMT325\u003c\/strong\u003e \u003cstrong\u003eLN2 2.2L\u003c\/strong\u003e to regulate fuel trim and catalyst efficiency.\u003c\/p\u003e\u003ch3\u003eThe Stock GMC Sonoma Oxygen Sensor Failure\u003c\/h3\u003e\u003cp\u003eOver repeated heat cycles on the \u003cstrong\u003eGMT325\u003c\/strong\u003e chassis, factory zirconia elements suffer carbon fouling and internal heater burnout. Exhaust heat soak along the \u003cstrong\u003eLN2 2.2L I4\u003c\/strong\u003e manifold degrades the upstream sensor response rate, slowing voltage switching between rich and lean states. Simultaneously, a lazy downstream sensor compromises catalyst monitoring, triggering \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, and \u003cstrong\u003eP0171\u003c\/strong\u003e diagnostic trouble codes while skewing closed-loop fuel delivery.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Oxygen Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ Heater DTCs:\u003c\/strong\u003e Codes like \u003cstrong\u003eP0134\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, or \u003cstrong\u003eP0141\u003c\/strong\u003e from failed sensor heaters or sluggish voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRich Fuel Trim \u0026amp; Rough Idle:\u003c\/strong\u003e Skewed upstream feedback forces rich open-loop fueling and unstable idle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor MPG \u0026amp; Failed Emissions:\u003c\/strong\u003e Delayed O2 feedback cuts fuel economy and triggers false \u003cstrong\u003eP0420\u003c\/strong\u003e faults.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Matched O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both sensors as a matched set restores synchronized pre- and post-catalyst feedback on the \u003cstrong\u003eGMT325\u003c\/strong\u003e exhaust. Each direct-fit unit uses a fast-light-off heated ceramic element inside corrosion-resistant stainless steel with factory weatherpack connectors. Precision protective shields resist thermal shock and fouling while maintaining OEM thread geometry. No splicing is needed, as both sensors thread directly into stock manifold and exhaust bungs for accurate ECM calibration.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 Upstream Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003e1 Downstream Oxygen Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\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;\"\u003e2000-2003 GMC Sonoma\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;\"\u003eLN2 2.2L I4 \/ GMT325\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;\"\u003eSensor Architecture\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eHeated Zirconia \/ 4-Wire Direct-Fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Thread-In OEM Replacement (No Cutting or Splicing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2000-2003 GMC Sonoma 2.2L (\u003cstrong\u003eGMT325\u003c\/strong\u003e \/ \u003cstrong\u003eLN2\u003c\/strong\u003e — 2-Sensor System)\u003c\/li\u003e\n\u003cli\u003eChevrolet S-10 2000-2003 2.2L is offered separately; confirm engine before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the GMT325 Sonoma?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for the 2000-2003 GMC Sonoma with the \u003cstrong\u003eLN2 2.2L\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 4.3L V6 models; verify engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135 and P0141 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when caused by worn sensors.\u003c\/strong\u003e New upstream and downstream sensors restore heater resistance and voltage switching to resolve \u003cstrong\u003eP0135\u003c\/strong\u003e and \u003cstrong\u003eP0141\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eAre connectors plug-and-play without splicing?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct-fit OEM connectors and factory-length harnesses thread straight into stock \u003cstrong\u003eGMT325\u003c\/strong\u003e bungs.\u003c\/p\u003e\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\u003cp\u003eBuilt for thermal durability under daily hauling on the \u003cstrong\u003eGMT325\u003c\/strong\u003e platform, this matched set maintains accurate closed-loop fueling and reliable emissions compliance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68117621604600,"sku":"DS-EYGYS9759","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-gmc-sonoma-2000-2003-2-2l-1.jpg?v=1794714523","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-gmc-sonoma-2000-2003-2-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}