{"product_id":"4353011c91-genuine-international®-def-quality-level-sensor","title":"4353011C91 | Genuine International® Def Quality Level Sensor","description":"\u003cdiv id=\"ds_div\"\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e: Genuine International Def Quality Level Sensor \u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: Navistar\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 4353011C91\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e-DEF Header Height (IN)\u003cbr\u003e25\u003c\/p\u003e\n\u003cp\u003e-DEF Return Fitting Dia. (IN)\u003cbr\u003e5\/16 SAE J2044\u003c\/p\u003e\n\u003cp\u003e-Coolant Outlet Fitting Dia. (IN)\u003cbr\u003e5\/8 Hose Bead\u003c\/p\u003e\n\u003cp\u003e-Tank Interface\u003cbr\u003e6 Bolt\u003c\/p\u003e\n\u003cp\u003e-Electrical Connector\u003cbr\u003eDeutsch DT4 (STD)\u003c\/p\u003e\n\u003cp\u003e-Sensor Type\u003cbr\u003eDigital (canbus)\u003c\/p\u003e\n\u003cp\u003e-DEF Suction Fitting Dia. (IN)\u003cbr\u003e3\/8 SAE J2044\u003c\/p\u003e\n\u003cp\u003e-Coolant Inlet Fitting Dia. (IN)\u003cbr\u003e5\/8 Hose Bead\u003c\/p\u003e\n\u003cp\u003e-In-Tank Filter\u003cbr\u003e40µ\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003eCompatible Vehicle Models \u0026amp; Applications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eVehicle Compatibility:\u003c\/b\u003e Designed for \u003cb\u003eNavistar International®\u003c\/b\u003e medium and heavy-duty trucks equipped with \u003cb\u003e16-gallon (16G)\u003c\/b\u003e or \u003cb\u003e23-gallon (23G)\u003c\/b\u003e DEF tank configurations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eInternational Models:\u003c\/b\u003e LT Series, RH Series, MV Series, HV Series, ProStar, Durastar, WorkStar, and LoneStar models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBus Applications:\u003c\/b\u003e IC Bus® CE\/RE Series school and commercial buses.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eEngine Architecture:\u003c\/b\u003e Fits trucks powered by \u003cb\u003eNavistar International A26\u003c\/b\u003e engines, as well as \u003cb\u003eCummins® ISB6.7, L9, ISX15, and X15\u003c\/b\u003e diesel engines using standard Navistar\/IC Bus DEF tank headers.\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\u003eThe DEF Sensor Assembly is an Original Equipment (OE) integrated Quality Level Sensor (QLS) header produced by SSI Technologies for International commercial trucks and buses.\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\u003eThe is a combination sensing and pickup unit installed inside 16-gallon (16G) and 23-gallon (23G) Diesel Exhaust Fluid (DEF) tanks. It continuously gathers fluid data and communicates with the vehicle’s Engine Control Module (ECM) via the J1939 CAN bus network to maintain proper Selective Catalytic Reduction (SCR) emission control.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Core Functions\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDEF Level Sensing:\u003c\/b\u003e Uses an ultrasonic sensor to monitor remaining DEF volume and report accurate levels to the driver dashboard.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDEF Quality \u0026amp; Concentration Sensing:\u003c\/b\u003e Monitors urea concentration (ensuring the standard ~32.5% purity) to protect the SCR system from diluted or improper fluids.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eTemperature Monitoring \u0026amp; Thawing:\u003c\/b\u003e Measures DEF temperature and utilizes an internal coolant loop connection to defrost frozen DEF during cold weather operations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFluid Delivery \u0026amp; Return:\u003c\/b\u003e Features integrated pickup and return ports to feed fluid to the DEF dosing unit and handle overflow return.\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\u003e\u003cspan\u003eSigns of Faulty\u003c\/span\u003e\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. Engine Power Derate \u0026amp; Speed Restrictions\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWhen sensor failure prevents the ECM from verifying proper SCR operation, the vehicle enters a forced inducement protocol:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eInitial Warning:\u003c\/b\u003e Check Engine light and Stop Engine \/ Emissions lights turn on with audible chimes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePower Derate:\u003c\/b\u003e Engine horsepower and torque are reduced by \u003cb\u003e25% to 40%\u003c\/b\u003e, making it difficult to haul heavy loads or maintain highway speeds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFinal Speed Limit (5 MPH Mode):\u003c\/b\u003e If unaddressed, the vehicle will eventually be restricted to a \u003cb\u003e5 mph (8 km\/h) low-idle crawl mode\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Diagnostic Trouble Codes (DTCs)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eConnecting a diagnostic tool (such as Navistar ServiceMaxx or Cummins Insite) will reveal specific J1939 fault codes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSPN 1761 \/ FMI 9 or 19:\u003c\/b\u003e DEF Tank Level - Abnormal Update Rate or Error.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSPN 3031 \/ FMI 2 or 9:\u003c\/b\u003e DEF Tank Temperature - Data Erratic or Incorrect.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSPN 3516 \/ FMI 2 or 12:\u003c\/b\u003e DEF Concentration \/ Quality - Bad Device or Component.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSPN 3364 \/ FMI 9:\u003c\/b\u003e Improper DEF Quality Detected.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. Inaccurate or \"Stuck\" DEF Level Gauge\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA failed ultrasonic sensing element inside the SSI unit causes erratic gauge behavior:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eThe gauge on the dashboard may remain frozen at \u003cb\u003e100% (Full)\u003c\/b\u003e or drop immediately to \u003cb\u003e0% (Empty)\u003c\/b\u003e despite a full tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFrequent \"DEF Refill Needed\" warnings pop up unexpectedly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e4. False \"Poor DEF Quality\" Alerts\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eAn internal failure of the concentration sensor sends corrupted density signals to the ECM. Even if the tank is filled with fresh, ultra-pure DEF (~32.5% urea), the cluster display will warn of \u003cb\u003e\"Incompatible or Contaminated DEF Fluid.\"\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e5. DEF Freeze \u0026amp; Thaw Failure in Cold Climates\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIf the internal temperature thermistor or coolant heating valve circuit fails:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIn freezing temperatures, the ECM cannot accurately detect if DEF is frozen and will fail to trigger coolant flow to thaw it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe dosing pump runs dry or becomes starved of liquid DEF, leading to active dosing system errors.\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\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003eNavistar® 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\/div\u003e\n\u003cdiv id=\"gtx-trans\" style=\"position: absolute; left: 161px; top: 303px;\"\u003e\n\u003cdiv class=\"gtx-trans-icon\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"International®","offers":[{"title":"Default Title","offer_id":49065062531316,"sku":"4353011C91","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/products\/RWERWERWER_1d861cbf-3e5f-4629-836a-58e427fba3d7.webp?v=1709462167","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/4353011c91-genuine-international%c2%ae-def-quality-level-sensor","provider":"First Truck Parts","version":"1.0","type":"link"}