{"product_id":"standard-ignition-th391-throttle-position-sensor","title":"Standard Ignition TH391 Throttle Position Sensor","description":"\u003ch2\u003eReliable Throttle Position Sensor for Lexus and Toyota Vehicles\u003c\/h2\u003e\u003cp\u003eThe Standard Ignition TH391 throttle position sensor is designed to provide accurate throttle position readings for a range of Lexus and Toyota models. This sensor helps maintain optimal engine performance and fuel efficiency by delivering precise data to the vehicle's engine control unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Lexus and Toyota models including Camry, ES300, GS300, GS430, IS300, LS430, LX470, Prius, SC300, SC400, SC430, and Sequoia\u003c\/li\u003e\n\u003cli\u003eOEM-quality replacement part ensuring reliable throttle position measurement\u003c\/li\u003e\n\u003cli\u003ePart number TH391 for easy identification and fitment verification\u003c\/li\u003e\n\u003cli\u003eDirect fit sensor designed to meet factory specifications\u003c\/li\u003e\n\u003cli\u003eSupports emission control system functionality\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Compatibility\u003c\/h2\u003e\u003cp\u003eThe Standard Ignition TH391 throttle position sensor is engineered to match the original equipment specifications for a variety of Lexus and Toyota vehicles. It accurately monitors the position of the throttle valve, sending real-time data to the engine control module to regulate fuel injection and ignition timing. This sensor is essential for maintaining smooth acceleration, proper idle speed, and overall engine responsiveness. Compatible with popular models such as the Toyota Camry and Prius, as well as Lexus models including the GS300, LS430, and LX470, this sensor ensures consistent performance across multiple vehicle platforms.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eResolves erratic idle or stalling problems caused by faulty throttle position readings\u003c\/li\u003e\n\u003cli\u003eImproves throttle response and acceleration consistency\u003c\/li\u003e\n\u003cli\u003eHelps correct engine hesitation or surging during acceleration\u003c\/li\u003e\n\u003cli\u003eSupports emission control by providing accurate throttle data\u003c\/li\u003e\n\u003cli\u003ePrevents check engine light triggers related to throttle position sensor faults\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Standard Ignition TH391 throttle position sensor requires basic automotive tools and mechanical knowledge. Before installation, ensure the vehicle's battery is disconnected to prevent electrical shorts. Remove the old sensor carefully to avoid damaging the throttle body. Align the new sensor properly and secure it with the original mounting hardware. After installation, it is recommended to clear any diagnostic trouble codes and perform a throttle position sensor calibration if required by the vehicle's service manual.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eStandard Ignition parts are manufactured to meet or exceed OEM standards, providing dependable performance and durability. The TH391 throttle position sensor undergoes rigorous quality control testing to ensure consistent operation. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in material and workmanship to provide confidence in the product's reliability.\u003c\/p\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":44713684893877,"sku":"FBHK-TH391","price":70.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_TH391_Fro.jpg?v=1775094855","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-th391-throttle-position-sensor","provider":"PartCatalog","version":"1.0","type":"link"}