{"product_id":"oxygen-sensors-for-nissan-sentra-2000-2002-1-8l-downstream","title":"Oxygen Sensors for Nissan Sentra (2000-2002) 1.8L Downstream","description":"\u003ch2\u003eDirect-Fit Downstream Oxygen Sensor for 2000-2002 Nissan Sentra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Downstream Oxygen Sensor monitors post-catalytic exhaust gas chemistry on the 2000-2002 Sentra to verify catalyst efficiency, stabilize secondary closed-loop fuel trim calculations, and prevent false check engine illumination.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan Sentra Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory secondary oxygen sensors on high-mileage \u003cstrong\u003eB15\u003c\/strong\u003e chassis platforms frequently suffer from ceramic thimble fouling, thermal degradation, and internal heater circuit failure. Constant exposure to extreme exhaust heat cycles and carbon particulates slows the sensor's voltage transition rate. When the aged sensor fails to read between 0.1V and 0.9V accurately, the powertrain control module (PCM) registers diagnostic trouble codes such as P0137, P0138, P0140, or false-positive P0420 catalyst efficiency codes, directly compromising fuel economy and emissions testing compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement downstream sensor incorporates a precision-engineered zirconium dioxide solid electrolyte element shielded by a double-layered 304 stainless steel protective housing. Designed specifically for the exhaust velocity and backpressure profile of the \u003cstrong\u003eQG18DE\u003c\/strong\u003e powertrain, it features an integrated fast-acting ceramic heater that reaches operating temperature within seconds of cold start. Factory-style terminal pinning and a weather-sealed connector eliminate wire splicing, preventing signal resistance drift and guaranteeing accurate downstream millivolt feedback to the factory engine management system.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2000-2002 Nissan Sentra\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;\"\u003e\n\u003cstrong\u003eQG18DE\u003c\/strong\u003e \/ \u003cstrong\u003eB15\u003c\/strong\u003e\n\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;\"\u003e126 hp \/ 129 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2000 Nissan Sentra XE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n  \u003cli\u003e2000 Nissan Sentra GXE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n  \u003cli\u003e2001 Nissan Sentra XE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n  \u003cli\u003e2001 Nissan Sentra GXE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n  \u003cli\u003e2002 Nissan Sentra XE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n  \u003cli\u003e2002 Nissan Sentra GXE Sedan 1.8L 4-Cylinder (QG18DE) Downstream\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the B15 Sentra?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2000-2002 Nissan Sentra equipped with the \u003cstrong\u003eQG18DE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this resolve a downstream heater circuit DTC such as P0141?\u003c\/strong\u003e\u003cbr\u003e Yes, replacing an internally open or shorted sensor element restores heater continuity and clears secondary circuit codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to deliver clean signal feedback and factory combustion telemetry, this sensor restores correct JDM closed-loop feedback balance, idle refinement, and full emissions compliance without harness splicing or ECU recalibration.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50511721890040,"sku":"DS-EQTRDWFKT","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/oxygen-sensors-for-nissan-sentra-2000-2002-1-8l-downstream-1.jpg?v=1789418505","url":"https:\/\/performancechiptuning.com\/products\/oxygen-sensors-for-nissan-sentra-2000-2002-1-8l-downstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}