{"product_id":"4353001c92-international-qls-sensor-tank-def-7-gal-head-c","title":"4353001C92  | International QLS Sensor, Tank, Def, 7 Gal, Head C","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: International QLS Sensor, Tank, Def, 7 Gal, Head \u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New \u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: International \u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 4353001C92 \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp id=\"p-rc_604a4ae560027c9a-147\"\u003e\u003cspan class=\"citation-318\"\u003ePart number \u003c\/span\u003e\u003cspan class=\"citation-318 citation-end-318\"\u003eis fitted to International \/ Navistar heavy-duty and medium-duty truck platforms equipped with 7-gallon DEF tanks:\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_604a4ae560027c9a-148\"\u003e\u003cb\u003eClass 8 Highway Trucks:\u003c\/b\u003e \u003cspan class=\"citation-317 citation-end-317\"\u003eInternational ProStar, LT Series, LoneStar.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eVocational \u0026amp; Regional Trucks:\u003c\/b\u003e International WorkStar, DuraStar, HV Series, HX Series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_604a4ae560027c9a-149\"\u003e\u003cb\u003eCompatible Engine Platforms:\u003c\/b\u003e \u003cspan class=\"citation-316 citation-end-316\"\u003eCummins ISX15 \/ X15, Navistar N13 \/ MaxxForce engines paired with SCR aftertreatment systems.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cb\u003eDEF Tank Header Assembly\u003c\/b\u003e is an all-in-one emissions control component installed inside a 7-gallon Diesel Exhaust Fluid (DEF) tank. It measures fluid parameters, draws DEF to the dosing unit, and prevents the fluid from freezing.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart is a complete multi-function \"header unit\" (or pickup module) submerged inside the DEF tank of commercial trucks. It connects the DEF tank directly to the vehicle’s ECM and Selective Catalytic Reduction (SCR) aftertreatment system.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Integrated Functions\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eQuality \u0026amp; Level Sensing (QLS):\u003c\/b\u003e Uses an ultrasonic\/optical sensor stem to measure real-time DEF fluid level, DEF concentration percentage (ensuring no dilution\/contamination), and fluid temperature.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFluid Suction \u0026amp; Return Lines:\u003c\/b\u003e Features stainless steel pickup tubes that transport DEF to the dosing pump and cycle unneeded fluid back to the tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCoolant Heating Loop:\u003c\/b\u003e Contains built-in coolant coils connected to the engine’s cooling system to thaw frozen DEF (which freezes at 12°F \/ -11°C).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIn-Tank Filtration:\u003c\/b\u003e Features a mesh filter screen at the bottom of the pickup tube to block debris before fluid enters the dosing pump.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"attachment-container search-images\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of Faulty\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. Active Check Engine Light (CEL) \u0026amp; SCR Fault Codes\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe engine control module (ECM) detects inaccurate sensor signals or lost J1939 CAN-bus communication from the Quality, Level, and Temperature Sensor (QLS):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCommon Diagnostic Trouble Codes (DTCs):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 1761 \/ FMI 9, 11, 19\u003c\/code\u003e (DEF Tank Level - Abnormal Rate of Change \/ Communication Error)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 3364 \/ FMI 2, 9, 11\u003c\/code\u003e (DEF Quality - Incorrect Concentration Detected)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 3031 \/ FMI 9, 11\u003c\/code\u003e (DEF Tank Temperature - Data Erratic or Missing)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ccode\u003eSPN 4364 \/ FMI 18\u003c\/code\u003e (SCR NOx Conversion Efficiency Below Limit)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Incorrect DEF Level Gauge Readings\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The DEF level gauge on the dash stays stuck at \"Full\", drops to \"Empty\" with a full tank, or fluctuates wildly while driving.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Internal float failure, ultrasonic sensor stem degradation, or wiring harness corrosion inside the 4-pin connector.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. False \"Poor DEF Quality\" Warnings \u0026amp; De-rate Indication\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Dash warning alerts indicating \"Incorrect DEF Detected\" or \"Improper Fluid Quality\", even after draining and refilling with fresh 32.5% ISO 22241 DEF.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eConsequence:\u003c\/b\u003e Triggers the vehicle’s de-rate timer, limiting speed (e.g., 55 mph, 5 mph) or reducing engine horsepower until replaced.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e4. DEF Tank Freezing in Cold Weather\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Fluid inside the tank remains frozen during sub-zero operations, causing DEF pump starvations and pressure faults (\u003ccode\u003eSPN 3556\u003c\/code\u003e).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Internal coolant valve failure or clogged heating loop inside the header assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eNavistar®\u003c\/strong\u003e is a proud manufacturer of some of the widely used trucks, yellow school buses, defense vehicles, and engines. It was recognized as the first truck and engine manufacturer to be certified by the EPA for meeting 2007 standards for hydrocarbons and particulate matter. But the company's global portfolio is not limited to its line of vehicles and engines—it also carries high-quality replacement parts and accessories to keep all these working in top condition at all times. From hose fuel, bolts, plugs, rivets, and bearings to flashers, incandescent lamps, camshaft brake, gasket injector, and spring door locks, Navistar has also got you covered.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days\u003c\/strong\u003e warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003c\/p\u003e","brand":"International®","offers":[{"title":"Default Title","offer_id":49064484700404,"sku":"4353001C92","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/4097722c91_1_7910cd47-dd0e-49af-a54f-e195793d199a.png?v=1709520223","url":"https:\/\/firsttruckparts.com\/products\/4353001c92-international-qls-sensor-tank-def-7-gal-head-c","provider":"First Truck Parts","version":"1.0","type":"link"}