{"product_id":"5511172-genuine-paccar®-def-doser-injector-for-epa24-15l-isx-qsx","title":"5511172 | Genuine Paccar® DEF Doser Injector For EPA24 15L ISX\/QSX","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003cbr\u003e\u003c\/strong\u003eA DEF Doser Injector \u003cstrong\u003e5511172 \u003c\/strong\u003e(also called a DEF injector or dosing valve) is the component that sprays Diesel Exhaust Fluid (DEF) into the exhaust stream as part of the SCR (Selective Catalytic Reduction) system.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 5511172\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eManufacture\/Brand\u003c\/strong\u003e\u003cspan\u003e: Paccar\u003cbr\u003e\u003c\/span\u003e\u003cstrong data-start=\"160\" data-end=\"176\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eFits 5511172 \u003c\/strong\u003eFor EPA24 15L ISX\/QSX\u003cbr\u003e\u003c\/p\u003e\n\u003cul id=\"catalogModels\" class=\"nav catalog\"\u003e\u003c\/ul\u003e\n\u003cp data-start=\"160\" data-end=\"353\"\u003e\u003cstrong\u003ePurpose of using 5511172:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-end=\"338\" data-start=\"302\"\u003e\u003cstrong\u003e1. Reduces harmful NOx emissions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"493\" data-start=\"339\"\u003e\n\u003cli data-end=\"374\" data-start=\"339\"\u003e\n\u003cp data-end=\"374\" data-start=\"341\"\u003eSprays DEF into hot exhaust gases\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"409\" data-start=\"375\"\u003e\n\u003cp data-end=\"409\" data-start=\"377\"\u003eDEF breaks down into \u003cstrong data-end=\"409\" data-start=\"398\"\u003eammonia\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"450\" data-start=\"410\"\u003e\n\u003cp data-end=\"450\" data-start=\"412\"\u003eAmmonia reacts in the \u003cstrong data-end=\"450\" data-start=\"434\"\u003eSCR catalyst\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"493\" data-start=\"451\"\u003e\n\u003cp data-end=\"493\" data-start=\"453\"\u003eConverts \u003cstrong data-end=\"493\" data-start=\"462\"\u003eNOx into nitrogen and water\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"582\" data-start=\"495\"\u003e\u003cstrong data-end=\"514\" data-start=\"495\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"517\" data-start=\"514\"\u003eNOx emissions are harmful and tightly regulated by EPA standards.\u003c\/p\u003e\n\u003cp data-end=\"624\" data-start=\"589\"\u003e\u003cstrong\u003e2. Enables SCR system operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"727\" data-start=\"625\"\u003e\n\u003cli data-end=\"683\" data-start=\"625\"\u003e\n\u003cp data-end=\"683\" data-start=\"627\"\u003eActs as the \u003cstrong data-end=\"657\" data-start=\"639\"\u003edelivery point\u003c\/strong\u003e for DEF in the SCR system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"727\" data-start=\"684\"\u003e\n\u003cp data-end=\"727\" data-start=\"686\"\u003eWorks with the DEF pump, sensors, and ECM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"805\" data-start=\"729\"\u003e\u003cstrong data-end=\"748\" data-start=\"729\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"751\" data-start=\"748\"\u003eWithout proper dosing, the SCR system cannot function.\u003c\/p\u003e\n\u003cp data-end=\"854\" data-start=\"812\"\u003e\u003cstrong\u003e3. Prevents engine derate and shutdown\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"945\" data-start=\"855\"\u003e\n\u003cli data-end=\"893\" data-start=\"855\"\u003e\n\u003cp data-end=\"893\" data-start=\"857\"\u003eEnsures emissions stay within limits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"945\" data-start=\"894\"\u003e\n\u003cp data-end=\"945\" data-start=\"896\"\u003eAvoids warning countdowns and reduced power modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1027\" data-start=\"947\"\u003e\u003cstrong data-end=\"966\" data-start=\"947\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"969\" data-start=\"966\"\u003eKeeps the truck running at full power and avoids downtime.\u003c\/p\u003e\n\u003cp data-end=\"1070\" data-start=\"1034\"\u003e\u003cstrong\u003e4. Improves emissions efficiency\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1167\" data-start=\"1071\"\u003e\n\u003cli data-end=\"1128\" data-start=\"1071\"\u003e\n\u003cp data-end=\"1128\" data-start=\"1073\"\u003eInjects \u003cstrong data-end=\"1100\" data-start=\"1081\"\u003eprecise amounts\u003c\/strong\u003e of DEF based on engine load\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1167\" data-start=\"1129\"\u003e\n\u003cp data-end=\"1167\" data-start=\"1131\"\u003ePrevents over-dosing or under-dosing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1261\" data-start=\"1169\"\u003e\u003cstrong data-end=\"1188\" data-start=\"1169\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"1191\" data-start=\"1188\"\u003eProper dosing protects the SCR catalyst and optimizes DEF consumption.\u003c\/p\u003e\n\u003cp data-end=\"1319\" data-start=\"1268\"\u003e\u003cstrong\u003e5. Maintains legal and environmental compliance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1399\" data-start=\"1320\"\u003e\n\u003cli data-end=\"1363\" data-start=\"1320\"\u003e\n\u003cp data-end=\"1363\" data-start=\"1322\"\u003eRequired for EPA and emissions compliance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1399\" data-start=\"1364\"\u003e\n\u003cp data-end=\"1399\" data-start=\"1366\"\u003eEssential for passing inspections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1492\" data-start=\"1401\"\u003e\u003cstrong data-end=\"1420\" data-start=\"1401\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"1423\" data-start=\"1420\"\u003eOperating without it can lead to fines and out-of-service violations.\u003c\/p\u003e\n\u003cp data-end=\"1533\" data-start=\"1499\"\u003e\u003cstrong\u003e6. Protects exhaust components\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1628\" data-start=\"1534\"\u003e\n\u003cli data-end=\"1586\" data-start=\"1534\"\u003e\n\u003cp data-end=\"1586\" data-start=\"1536\"\u003eCorrect spray pattern prevents DEF crystallization\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1628\" data-start=\"1587\"\u003e\n\u003cp data-end=\"1628\" data-start=\"1589\"\u003eReduces buildup and clogging in exhaust\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1704\" data-start=\"1630\"\u003e\u003cstrong data-end=\"1649\" data-start=\"1630\"\u003eWhy it matters:\u003c\/strong\u003e\u003cbr data-end=\"1652\" data-start=\"1649\"\u003eExtends life of the SCR catalyst and exhaust system.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-start=\"160\" data-end=\"353\"\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cstrong data-start=\"585\" data-end=\"597\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of a Bad DEF Doser Injector 5511172:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp data-start=\"257\" data-end=\"285\"\u003e\u003cstrong\u003e1. SCR \/ DEF fault codes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"286\" data-end=\"435\"\u003e\n\u003cli data-start=\"286\" data-end=\"309\"\u003e\n\u003cp data-start=\"288\" data-end=\"309\"\u003eCheck Engine Light on\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"310\" data-end=\"435\"\u003e\n\u003cp data-start=\"312\" data-end=\"435\"\u003eSCR efficiency or NOx conversion codes\u003cbr data-start=\"350\" data-end=\"353\"\u003e\u003cstrong data-start=\"353\" data-end=\"361\"\u003eWhy:\u003c\/strong\u003e DEF isn’t being injected correctly (too much, too little, or not at all).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"442\" data-end=\"482\"\u003e\u003cstrong\u003e2. Engine derate or speed limitation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"483\" data-end=\"573\"\u003e\n\u003cli data-start=\"483\" data-end=\"498\"\u003e\n\u003cp data-start=\"485\" data-end=\"498\"\u003ePower reduced\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"499\" data-end=\"573\"\u003e\n\u003cp data-start=\"501\" data-end=\"573\"\u003eCountdown to shutdown\u003cbr data-start=\"522\" data-end=\"525\"\u003e\u003cstrong data-start=\"525\" data-end=\"533\"\u003eWhy:\u003c\/strong\u003e Emissions system can’t meet EPA limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"580\" data-end=\"623\"\u003e\u003cstrong\u003e3. White crystals or buildup at exhaust\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"624\" data-end=\"749\"\u003e\n\u003cli data-start=\"624\" data-end=\"749\"\u003e\n\u003cp data-start=\"626\" data-end=\"749\"\u003eChalky white residue near injector or pipe\u003cbr data-start=\"668\" data-end=\"671\"\u003e\u003cstrong data-start=\"671\" data-end=\"679\"\u003eWhy:\u003c\/strong\u003e DEF leaking, dripping, or poor spray pattern causing crystallization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"756\" data-end=\"788\"\u003e\u003cstrong\u003e4. Excessive DEF consumption\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"789\" data-end=\"872\"\u003e\n\u003cli data-start=\"789\" data-end=\"872\"\u003e\n\u003cp data-start=\"791\" data-end=\"872\"\u003eDEF level drops faster than normal\u003cbr data-start=\"825\" data-end=\"828\"\u003e\u003cstrong data-start=\"828\" data-end=\"836\"\u003eWhy:\u003c\/strong\u003e Injector stuck open or over-dosing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"879\" data-end=\"923\"\u003e\u003cstrong\u003e5. Strong ammonia or sharp exhaust smell\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"924\" data-end=\"1007\"\u003e\n\u003cli data-start=\"924\" data-end=\"1007\"\u003e\n\u003cp data-start=\"926\" data-end=\"1007\"\u003eNoticeable DEF\/ammonia odor\u003cbr data-start=\"953\" data-end=\"956\"\u003e\u003cstrong data-start=\"956\" data-end=\"964\"\u003eWhy:\u003c\/strong\u003e Over-injection or incomplete SCR reaction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1014\" data-end=\"1049\"\u003e\u003cstrong\u003e6. Poor NOx efficiency readings\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1050\" data-end=\"1137\"\u003e\n\u003cli data-start=\"1050\" data-end=\"1137\"\u003e\n\u003cp data-start=\"1052\" data-end=\"1137\"\u003eNOx sensor codes upstream\/downstream\u003cbr data-start=\"1088\" data-end=\"1091\"\u003e\u003cstrong data-start=\"1091\" data-end=\"1099\"\u003eWhy:\u003c\/strong\u003e DEF not atomizing or mixing properly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1144\" data-end=\"1186\"\u003e\u003cstrong\u003e7. Injector not clicking or responding\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1187\" data-end=\"1266\"\u003e\n\u003cli data-start=\"1187\" data-end=\"1266\"\u003e\n\u003cp data-start=\"1189\" data-end=\"1266\"\u003eNo audible click during test\u003cbr data-start=\"1217\" data-end=\"1220\"\u003e\u003cstrong data-start=\"1220\" data-end=\"1228\"\u003eWhy:\u003c\/strong\u003e Electrical failure or stuck injector.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1273\" data-end=\"1308\"\u003e\u003cstrong\u003e8. Clogged or sticking injector\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1309\" data-end=\"1434\"\u003e\n\u003cli data-start=\"1309\" data-end=\"1330\"\u003e\n\u003cp data-start=\"1311\" data-end=\"1330\"\u003eIntermittent faults\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1331\" data-end=\"1434\"\u003e\n\u003cp data-start=\"1333\" data-end=\"1434\"\u003eWorks after regen or long drive, then fails again\u003cbr data-start=\"1382\" data-end=\"1385\"\u003e\u003cstrong data-start=\"1385\" data-end=\"1393\"\u003eWhy:\u003c\/strong\u003e DEF crystallization inside injector tip.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1441\" data-end=\"1483\"\u003e\u003cstrong\u003e9. Rough exhaust flow or visible vapor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1484\" data-end=\"1564\"\u003e\n\u003cli data-start=\"1484\" data-end=\"1564\"\u003e\n\u003cp data-start=\"1486\" data-end=\"1564\"\u003eWhite vapor from exhaust (not smoke)\u003cbr data-start=\"1522\" data-end=\"1525\"\u003e\u003cstrong data-start=\"1525\" data-end=\"1533\"\u003eWhy:\u003c\/strong\u003e Unburned DEF entering exhaust.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1571\" data-end=\"1610\"\u003e\u003cstrong\u003e10. Won’t pass emissions inspection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1611\" data-end=\"1676\"\u003e\n\u003cli data-start=\"1611\" data-end=\"1676\"\u003e\n\u003cp data-start=\"1613\" data-end=\"1676\"\u003eHigh NOx readings\u003cbr data-start=\"1630\" data-end=\"1633\"\u003e\u003cstrong data-start=\"1633\" data-end=\"1641\"\u003eWhy:\u003c\/strong\u003e DEF not being delivered correctly.\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 data-start=\"97\" data-end=\"476\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eAbout the Manufacturer – \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003ePaccar:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"0\" data-end=\"381\"\u003e\u003cstrong data-end=\"110\" data-start=\"96\"\u003ePACCAR Inc\u003c\/strong\u003e is a global technology leader in the design, manufacture, and customer support of premium light-, medium-, and heavy-duty trucks. Founded in 1905 and headquartered in Bellevue, Washington, PACCAR is best known for its world-class truck brands: Kenworth, Peterbilt, and DAF.\u003cbr\u003ePACCAR’s trucks are recognized for their durability, fuel efficiency, advanced engineering, and driver-focused technology. In addition to truck manufacturing, PACCAR also designs and builds diesel engines, and provides financial services, information technology, and aftermarket support to its global customer base.\u003c\/p\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":50472784822519,"sku":"5511172","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/7080\/3959\/files\/onan5506855injectordoseronancumminsoriginaloempart-nwm__47250.jpg?v=1770159863","url":"https:\/\/forcetruckparts.com\/products\/5511172-genuine-paccar%c2%ae-def-doser-injector-for-epa24-15l-isx-qsx","provider":"Force Truck Parts","version":"1.0","type":"link"}