{"product_id":"o2-oxygen-sensor-upstream-downstream-for-hyundai-sonata-2009-2010-2-4l","title":"O2 Oxygen Sensor Upstream Downstream for Hyundai Sonata (2009-2010) 2.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Kit for 2009-2010 Hyundai Sonata (NF)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This upstream and downstream oxygen sensor kit regulates air-fuel ratios and monitors catalyst efficiency on the \u003cstrong\u003e2009-2010 Hyundai Sonata\u003c\/strong\u003e (\u003cstrong\u003eNF\u003c\/strong\u003e) with the \u003cstrong\u003eG4KC 2.4L\u003c\/strong\u003e engine.\u003c\/p\u003e\u003ch3\u003eThe Stock Hyundai Sonata Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory zirconia sensors on the \u003cstrong\u003eNF\u003c\/strong\u003e chassis \u003cstrong\u003eG4KC 2.4L\u003c\/strong\u003e endure severe thermal shock and exhaust fouling over time. Repeated heat soak degrades platinum electrodes and fractures the ceramic element, while internal heater coils open from vibration. As response latency slows, the ECM loses accurate lambda feedback and commands rich fuel trims. This triggers \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, and \u003cstrong\u003eP0141\u003c\/strong\u003e codes.\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:\u003c\/strong\u003e Stored codes like \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, or \u003cstrong\u003eP0141\u003c\/strong\u003e from heater failure or slow switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRich Fueling:\u003c\/strong\u003e Skewed upstream voltage forces excess fuel delivery, hurting MPG and fouling spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissions Failure:\u003c\/strong\u003e Downstream drift causes \u003cstrong\u003eP0420\u003c\/strong\u003e false triggers, rough idle, and failed inspection readiness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Zirconia Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both probes as a matched pair restores closed-loop fueling across bank 1 sensor 1 and sensor 2. Each unit features a laser-welded stainless housing, PTFE breather membrane, and fast-lightoff ceramic heater. Factory-length harnesses with OEM weatherproof plugs connect directly to the \u003cstrong\u003eG4KC 2.4L\u003c\/strong\u003e loom without splicing. Direct fitment for \u003cstrong\u003e39210-2C210\u003c\/strong\u003e, \u003cstrong\u003e39210-2G200\u003c\/strong\u003e, \u003cstrong\u003e234-5029\u003c\/strong\u003e, and \u003cstrong\u003e234-4238\u003c\/strong\u003e guarantees exact 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;\"\u003e2009-2010 Hyundai Sonata\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;\"\u003eG4KC 2.4L \/ NF\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;\"\u003eZirconia Ceramic (Upstream \u0026amp; 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 (No Cutting or Welding)\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;\"\u003e39210-2C210, 39210-2G200, 234-5029, 234-4238\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2009 Hyundai Sonata 2.4L\u003c\/li\u003e\n\u003cli\u003e2010 Hyundai Sonata 2.4L\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the NF Sonata?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for 2009-2010 Hyundai Sonata models with the \u003cstrong\u003eG4KC 2.4L\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 3.3L V6 models and 2006-2008 trims; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0133, P0135, or P0141 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e New sensors eliminate heater and response faults like \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, and \u003cstrong\u003eP0141\u003c\/strong\u003e when exhaust leaks and wiring faults are absent.\u003c\/p\u003e\u003ch4\u003eAre OEM connectors and anti-seize ready for install?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Pre-terminated OEM plugs and coated threads install directly; torque to 30 lb-ft with a 22mm socket.\u003c\/p\u003e\u003ch3\u003eThe Hyundai Precision Standard\u003c\/h3\u003e\u003cp\u003eEngineered for strict emissions compliance and reliable ECM voltage accuracy on daily-driven \u003cstrong\u003eNF\u003c\/strong\u003e sedans. Restored lambda control ensures clean combustion and CEL-free operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68115655721208,"sku":"DS-ETMWDYJXB","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-hyundai-sonata-2009-2010-2-4l-1.jpg?v=1794706801","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-hyundai-sonata-2009-2010-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}