{"product_id":"o2-oxygen-sensor-upstream-downstream-for-toyota-tacoma-2005-2012-2-7l","title":"O2 Oxygen Sensor Upstream Downstream for Toyota Tacoma (2005-2012) 2.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Sensor Kit for 2005-2012 Toyota Tacoma (N200)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This matched upstream and downstream oxygen sensor kit restores closed-loop fuel trim control and emissions monitoring on the 2005-2012 Toyota Tacoma (\u003cstrong\u003eN200\u003c\/strong\u003e) equipped with the \u003cstrong\u003e2TR-FE 2.7L\u003c\/strong\u003e engine.\u003c\/p\u003e\u003ch3\u003eThe Stock Toyota Tacoma Sensor Failure\u003c\/h3\u003e\u003cp\u003eOver extended thermal cycling on the \u003cstrong\u003eN200\u003c\/strong\u003e chassis with the \u003cstrong\u003e2TR-FE 2.7L I4\u003c\/strong\u003e, OEM oxygen sensors suffer heater element burnout, carbon fouling, and zirconia ceramic degradation. As the upstream air-fuel ratio sensor slows, the ECM loses accurate closed-loop fuel control and defaults to rich mapping. Meanwhile, a fatigued downstream sensor triggers \u003cstrong\u003eP0420\u003c\/strong\u003e catalyst efficiency alerts alongside \u003cstrong\u003eP0031\u003c\/strong\u003e, \u003cstrong\u003eP0136\u003c\/strong\u003e, and \u003cstrong\u003eP2195\u003c\/strong\u003e fault codes.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM O2 Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Active \u003cstrong\u003eP0031\u003c\/strong\u003e, \u003cstrong\u003eP0136\u003c\/strong\u003e, \u003cstrong\u003eP2195\u003c\/strong\u003e, or \u003cstrong\u003eP0420\u003c\/strong\u003e codes from heater circuit failure or sluggish voltage switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Hesitation:\u003c\/strong\u003e Delayed wideband feedback causes erratic fuel trims, throttle stumble, and fouled spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor Fuel Economy \u0026amp; Failed Emissions:\u003c\/strong\u003e Rich default mapping drops MPG and pushes tailpipe hydrocarbons past legal limits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Zirconia \u0026amp; AFR Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both sensors as a matched pair restores factory ECM voltage signaling using direct-fit units for \u003cstrong\u003e234-9008\u003c\/strong\u003e (upstream) and \u003cstrong\u003e234-4622\u003c\/strong\u003e (downstream) positions. Each sensor combines a laser-welded stainless steel body, breathable PTFE filter, and high-purity zirconia sensing element built to resist continuous exhaust heat soak. Pre-terminated OEM connectors eliminate wire splicing and achieve rapid light-off temperatures for precise closed-loop stoichiometry.\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;\"\u003e2005-2012 Toyota Tacoma\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;\"\u003e2TR-FE 2.7L I4 \/ N200\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;\"\u003eEmissions \u0026amp; Sensor Spec\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit AFR (Upstream) \/ Heated Zirconia (Downstream)\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 Bolt-On OEM Replacement (Plug-and-Play)\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;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e234-4622, 234-9008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2005-2012 Toyota Tacoma 2.7L (1 Upstream Air-Fuel Ratio Sensor \u0026amp; 1 Downstream Oxygen Sensor)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the N200 Tacoma?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for 2005-2012 Tacoma \u003cstrong\u003eN200\u003c\/strong\u003e with the \u003cstrong\u003e2TR-FE 2.7L\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 4.0L V6 models; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0031, P0136, or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor wear caused the fault.\u003c\/strong\u003e Replacing \u003cstrong\u003e234-9008\u003c\/strong\u003e and \u003cstrong\u003e234-4622\u003c\/strong\u003e clears heater and response codes; persistent \u003cstrong\u003eP0420\u003c\/strong\u003e indicates converter wear.\u003c\/p\u003e\u003ch4\u003eAre factory connectors attached for plug-and-play installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Both sensors include OEM connectors for zero-splice installation; apply O2-safe anti-seize strictly to threads before torquing.\u003c\/p\u003e\u003ch3\u003eThe Toyota Heavy-Duty Standard\u003c\/h3\u003e\u003cp\u003eBuilt for Tacoma trucks facing towing loads and sustained exhaust heat. Matched sensing keeps your \u003cstrong\u003e2TR-FE 2.7L\u003c\/strong\u003e running clean, efficient, and CEL-free.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119412637944,"sku":"DS-E8OSI8NYO","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-toyota-tacoma-2005-2012-2-7l-1.jpg?v=1794720794","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-toyota-tacoma-2005-2012-2-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}