Kenworth def quality sensor location. See MenuControlSwitchonpage3-77.

Kenworth def quality sensor location. Jan 25, 2021 · Def Quality issue Paccar MX13 Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by CrimsonPatriot, Jan 25, 2021. SPN3364 FMI17 and SPN4337 FMI04 codes indicate DEF quality sensor faults in the One Box unit. Q21 6127 007k1t. This OEM sensor ensures the engine control system receives accurate data, supporting proper SCR operation and emissions compliance. The DEF Quality Sensor for Kenworth trucks plays a critical role in monitoring Diesel Exhaust Fluid quality within the aftertreatment system. This particular truck is a 2020 kenworth t880 day cab. Apr 26, 2023 · DEF concentration directly influences SCR system performance. Tamerx DEF Quality Level Sensor 90035845 for Cummins ISB 6. Tank comes complete less DEF sensor. The Def Quality Sensor is a critical component in your Kenworth's emission system, designed to monitor Diesel Exhaust Fluid (DEF) quality and ensure proper system function. Replace the DEF filter and sensor as needed. Its robust construction withstands The Def Quality Sensor is a critical component in your Kenworth vehicle's aftertreatment system, ensuring optimal Diesel Exhaust Fluid (DEF) quality and proper system operation. Here's a detailed look: Function and Purpose Primary Function: The DEF sensor monitors the level, quality, and A DEF Quality Sensor, or Diesel Exhaust Fluid (DEF) Quality Sensor, is a vital product for Freightliner trucks. Jan 1, 2023 · The DEF quality sensor is mounted on the side of the DEF tank. 2Mb Download Paccar 2010 Multiplexed Electrical System Sevice Manual [PDF] 6. 2Mb Download Paccar 2005-2010 Service Manual [PDF] 6. I haven't reset the computer because I don't have a code reader for the MX-13 Paccar engine. its the peak of Kenworth T880 DEF Sensor for sale. 🕖 We work 24/7 with our customers all over the world. (03/17) Y53-1209-1D13-69 3 MULTI-FUNCTIONDISPLAY DEF(LowDieselExhaustFluid) TheDEFWarningscreenisdisplayed whentheDEFFluidlevelhasreached acriticallylowlevel. Kenworth T680 DEF Sensor for sale. 🛡️ Only genuine parts with a 365-Days warranty. Measures 16" across, 28" from back to cap, and about 24" tall. The Urea Quality Sensor is used to accurately monitor the concentration and quality of the DEF solution, and alert the user if the solution deviates from the acceptable concentration range or if there are any contaminants in the DEF tank. Use diagnostic software like Davie4 to clear codes properly; some tools may not reset the system without specific procedures The DEF Quality Sensor is an essential part of your Kenworth truck's emissions system, designed to monitor the quality and level of Diesel Exhaust Fluid. Mar 14, 2025 · Knowing how to fix a DEF level sensor can save time and money. Constructed from durable, corrosion-resistant materials, it withstands the demanding conditions of engine Apr 23, 2018 · Less Info : SCR Title Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV Applies : All To Please take the time to get acquainted with your vehicle by reading this Operator’s Manual. 4kb Download Paccar MX-11 Operator's Manual [PDF] 6. Verify DEF fluid meets 32. Premium quality, fast shipping, and in stock. Aug 16, 2021 · ive got a 2017 kenworth t800 with a bad def quality sensor. Emission regulations mandate that vehicles must have quality sensors. Paccar Sensor-Def Quality | Q21-6170-003K1T from Peterbilt Parts. Jun 19, 2024 · Understanding Scr System Fault The steps to fix a SCR system fault in a Kenworth truck include checking for a faulty NOx sensor, DEF quality sensor, or wiring issues to the SCR sensors or components. necessary if oilAdd Welcome to our channel! In today's video, Ryan is sharing with you how to replace the DPF/SCR Wiring Harness and SCR Temp Sensor. The most trusted online retailer for trucking equipment and accessories. X15 DEF Tank Level Quality Temperature Sensor Preventative Maintenance Fix Ethan Hayes 50 subscribers Subscribe Jul 15, 2025 · DEF Quality Sensor Brand New Genuine Paccar Kenworth Q21-6170-002 K1T Gen 2. Let’s dive in. Aug 18, 2017 · Bad DEF quality and Nox sensor ? Check engine lights but they come and go Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by Sekhri, Aug 18, 2017. (w/pics) Discussion in ' Trucks [ Eighteen Wheelers ] ' started by Deezl Smoke, Jul 9, 2023. Truck was throwing an scr fault code. In this video we tackle the #2 Problem on DEF and DPF Systems and offer some secrets and solutions on getting these problems fixed! We recommend replacing the Inlet/Outlet Nox Sensors every 2-3 Customer: Does my truck have a DEF quality sensor? If so, where can I locate it? I replaced the AfterTreatment Control Module, and the "Stop Engine Immediately" message went away, but it's still giving me problems. This is a GENUINE OEM Paccar DEF Quality Sensor. We're unable to determine the source of the DEF quality issue or the location of the sensor, as it’s not in the tank according to the parts list. Clean any corroded terminals and ensure secure connections. 5Mb Download Paccar MX-11 / MX-13 Programming Manual [PDF] 3Mb Download Paccar MX-13 2013 DEF tank off of a 2017 Kenworth T680 run for just 5,471 miles, non-wrecked. Performing necessary repairs or replacements can help resolve the issue. I've inspected the wiring harness as much as possible, but it's tangled with other wires. If your Volvo truck has DEF-related fault codes, engine derates, or an inaccurate DEF level gauge you may want to check the DEF level sensor. 7L-200 is built for 2018–2022 models. The tank was drained and new senor installed Kenworth T800 Mechanic's Assistant: It sounds frustrating to deal with sensor issues even after replacement. Open battery box door and verify Diesel Exhaust Fluid Quality Sensor (DQS) / Quality Level Sensor (QLS) connector location: If connector is located on top of DEF tank, proceed to Step 8. Also for: T800 2012. The DEF Quality Sender are used in Selective Catalytic Reduction (SCR) systems which helps reduces emmissions pollutants like NOx from engine exhaust gas. Limp home mode with DEF warnings often stems from DEF quality, sensor faults, or filter issues. Find reliable T800 Kenworth replacement parts with fast shipping, free warranty, and great prices. Resolution Additional diagnostic procedure to the related DEF urea quality sensor fault codes. #kenworth #peterbilt #hdtech #diagnoatictech #electricdiagnostics #heavydutytechnician #paccar #cummi Kenworth def level sensor replacement Tools Needed:• ratchet or electric/air• 16mm socket and wrench• 17mm socket• Channel Locks• Pick set• Needle Nose• Flat View and Download Kenworth T800 owner's manual online. Regularly check DEF quality and top off with approved fluid to prevent sensor errors and WHAT IS IT: DEF Quality Sensor Brand New Genuine Paccar Kenworth Q21-6170-008K1T Assembly Gen 2 *NOTICE - This sensor is the new 4 PIN connector and NOT the old 3 pin style. Designed for durability and precision, this sensor monitors DEF parameters to maintain compliance with emissions standards and vehicle performance. 🛡️ All DEF Sensors come with a 365-Days warranty. I suspect there might be a short in the wiring. Whats New Abstract Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. Fault Codes 3868, 4572 and 4677 Caused by Diesel Exhaust Fluid (DEF) Header Malfunction Keep your DEF tank above 50% in your Kenworth trucks. See full list on thecampingadvisor. Tamerx DEF Quality Sensor Q21-6170-001K1T for Paccar MX13 is built for 2013–2018. This sensor measures both the temperature and quality of the DEF fluid. NOTE Please make sure it is the right part you need because this product cannot be returned, the product is brand new Kenworth T800 DEF Sensor, P/N 04-30798-000 for sale. The DEF level sensor is part of a multi-purpose component that also includes the DEF quality sensor, DEF tank temperature sensor, and DEF tank heater. 2021 Peterbilt with a Cummins engine, emission derate was coming up on the display. Search our large inventory of New/Used Kenworth DEF Sensors for sale. First Truck Parts: This is An Online Store For Heavy Truck Parts. the parts are back ordered 2months from kenworth and 2 weeks aftermarket. See Figure 1 for DEF Pump Module heating element location. Engineered for durability and precision, this sensor provides accurate readings that help maintain emissions compliance and prevent costly repairs. If the sensor itself is faulty, replace it with an OEM part. ATTENTION🔥 WIN a Polar Fox Kenworth 2016 models with Cummins engines use three relays to control the DEF heater. Locate these relays in the engine compartment relay box or near the DEF tank. We recommend that you read and understand this manual from beginning to end before you operate this equipment. It also provides maintenance information, with an outline for performing safety checks and To troubleshoot DEF fluid level issues, inspect the DEF tank sensor wiring harness for corrosion or damage. Customer: The DEF fluid level in my 2019 T680 is full, but the cabin meter shows empty with a red blinking light, and the truck can only go 5 mph. It includes diagrams of connectors A, B, and C and pin labels for injectors, solenoids, sensors and the PCI ECU. Although I focus on Paccar power this also affects Kenworth Cummins power. Whether it’s a clogged sensor or an electrical issue, we’ll cover the basics, making the process simple and stress-free. PACCAR KENWORTH. . The exhaust pressure sensor is used to monitor the exhaust pressure and ensure that it is within a safe range. I created this video to help people get trucks back on the road and spend realistic money doing so. Q21 6167 004k1t. Just to clarify, is your vehicle a 2015 Kenworth T680 or a Kenworth T800? Customer: Yes 2015 t680 Mechanic's Assistant: Thank you for confirming that. It ensures that the diesel exhaust fluid entering the engine remains at optimal levels for peak efficiency and performance. It works to detect the concentration of urea in the DEF and confirm whether it is acceptable for effective dosing. The Def Quality Sensor plays a vital role in your Kenworth's aftertreatment system by continuously monitoring Diesel Exhaust Fluid (DEF) quality to ensure compliance with emissions standards and optimal engine performance. Additionally, we have software version 3997. Engineered for precision and durability, this sensor provides accurate readings that help prevent system failures and costly repairs. Expensive repair? Totally. DEF Quality Sensors from Paccar measure fluid level and concentration of DEF and alerts if solution deviates from the acceptable range. 2017 Kenworth DEF Tank and Quality Level Sensor Identification DEF tanks may develop leaks; level sensors can fail, causing inaccurate DEF fluid readings. Built with high-quality materials, this OEM sensor offers long-lasting durability and reliable The DEF Level and Temperature Sensor is a vital component that monitors the diesel exhaust fluid (DEF) tank's fluid level and temperature, ensuring your Kenworth vehicle remains compliant with emission standards. 9Mb Download Paccar MX ECM Circuit Diagram [PDF] 336. The DEF Quality Sensor is an essential component in the diesel exhaust fluid system of Kenworth trucks, ensuring the purity and proper functioning of DEF. Accurate detection ensures proper system operation, emissions compliance, and optimal engine performance. See Figure 2 for an example of a plugged DEF dosing valve inlet screen. The new updated sensors should should resolve the 1235-9 abnormal update rate faults (loss of communication to the DEF quality sensor) which is also a tank level and temp sensor. Overview The Urea Quality Level Sensor (UQLS) is a smart sensor that is located in the top of the Urea (DEF) Tank, commonly referred to as the DEF Level Sensor or Combined Tank Unit. 5% urea concentration. The recommended range for Engine Idle Shutdown Timer (EIST Shop quality Kenworth T800 aftertreatment truck parts at FleetRun Truck Parts. Reference Service Instruction section below. Kenworth with DEF codes. I Learn more about DEF quality sensors and their function in meeting EPA regulations in the trucking industry. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics. t800 pdf manual download. In this third Dr Paccar truck repair video I discuss the issue of failed 2016 to 2019 Kenworth DEF Quality sensors. DEF is contained in a separate tank on the vehicle, and the fluid level in the tank is shown on a gauge located on the dash (see Diesel Exhaust Fluid (DEF) Level Gauge on page 19). Apr 2, 2013 · Mx13 EPA 13 sensor locations Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by Edjahman, Apr 11, 2021. This guide will help you troubleshoot and repair your DEF sensor, restoring your vehicle’s performance. 7L is typically located near the DEF tank or dosing module. Just another day in the life of the If . But by following this step-by-step guide you’ll be able to replace the part yourself and save some precious cash. These sensors monitor DEF temperature and quality; failures trigger warnings and engine power reduction to protect emissions systems. Symptoms of a faulty sensor include DEF system warnings and limp mode activation. com My 2019 Kenworth with Paccar engine has a DEF temp fault code that the dealer troubleshot by last 8 of the vin JJ225240 Air Fuel Ratio Sensor (outlet of turbine side of turbocharger) Barometric Pressure Sensor (attached to side of ECM) Intake Manifold Temp and Pressure Sensors (driver side of intake manifold at front of engine) Opposite Side of 2012 PACCAR MX13 I6 Engine Found in These Trucks (starting 2010-current): Kenworth Peterbilt Leyland Truck DAF This can cause the DEF level to fluctuate or appear to be erratic. Jul 30, 2025 · The part number on these units is a Q21-6170-008K1T. Also, check for clogged DEF lines or injector problems causing improper dosing Customer: Def senor replaced on 2015 t680 still says bad quality. 3 days ago · Rawze. If the DEF level sensor is found to be faulty, replace it with a new one. Itmaybe suppressedbypushingenteronthe MCS(MenuControlSwitch). Q21 6170 004k1t. Information on Poor DEF Quality Message Displayed on Driver Information Center (DIC) and/or Malfunction Indicator Lamp (MIL) Illuminated - DTCs P249D and/or P249E Kenworth T680 DEF Sensor, P/N 350249 for sale. Dynacraft P/N M86-6223-00102 . Use a multimeter to check continuity between the sensor connector and the ECU. Hope you guys enjoy the video. This sensor monitors the quality of DEF to prevent contamination and ensure optimal SCR system performance. NOTICE - This sensor is the new 4 PIN connector and NOT the old 3 pin style. 🚚 We will ship your order on the same day. If that sensor goes out you are going to be in big big trouble if you don't have the parts already. 0 lb › See more product details PACCAR recommends the following for best operational performance for the MX-13 EPA2010 en-gine: Prolonged periods of low idle RPMs and high idle times at low ambient temperatures, along with low coolant temperature levels, can cause damage to the engine and the aftertreatment system (See the PACCAR MX-13 Engine Operator’s Manual). Replace Def quality sensor Kenwort peterbilt truckGet your favorite live sports, all in one place Apr 19, 2019 · 2018 m2 106 freightliner changed nox sensor now my DEF light won't go off. The diagrams show component names, part numbers, and color codes for tracing circuit connections. If the fluid breaks down that corruption can easily trigger a sensor and make it seem like it is failing. Like and share if this helped you. Oct 24, 2025 · DEF Quality Sensor Brand New Genuine Paccar Kenworth Q21-6170-007K1T Assembly Gen 2 *URGENT - We are getting returns of these sensors because the details in this listing are not being reviewed. com: Rawze's ISX Technical Discussion and more / Big Truck Technical Discussion / Freightliner related help / Ambient air and DEF problems and solution Freightliner M2 106/112 Diesel Exhaust Fluid Tank Level Sensor *Please verify your OEM number (s) before purchasing. WHAT IS IT: DEF Quality Sensor Brand New Genuine Paccar Kenworth Q21-6170-007K1T Assembly Gen 2 *URGENT - We are getting returns of these sensors because the details in this listing are not being reviewed. Freightliner DEF Tank Sensor Monitors Fluid Levels and Temperature OEM Part Number Cross Reference: A0427942000 Fits Freightliner Models (2010 - 2013): M2 106 M2 112 Complete Integrated Assembly with: Heater Tubes Temperature Sensor Connector Gender: Female Connector Shape: Oval This document provides an electrical wiring diagram for a PACCAR MX-13 engine and aftertreatment system. Enjoy our hassle-free online checkout or call to speak to an expert. Looking for wiring Mechanic's Assistant chat Customer: I couldn't find a specific fuse for the DEF quality sensor, but I did check all the fuses, and they seem fine. Not all units come with DEF quality sensors, the DEF Quality Sensor is an optional add-on depending on application. Customer: I have a Paccar with code 1517. Once we connected to the truck using our Insite software we were able to see the fault codes and make the Kenworth TrucksManuals For manuals covering PACCAR Powertrain, including engines, transmissions and axles, please refer to the PACCAR Powertrain website. If you cant figure the data out message me. If you're looking for First truck parts: Supplier of DEF Sensors for Heavy Duty Trucks. Tag #: 2897 $50. It will eventually derate the truck. See MenuControlSwitchonpage3-77. Dec 21, 2020 · Kenworth Def Sensor - Q21-6170-001K1T Brand: Kenworth Model Number: Q21-6170-001K1T Country Of Origin: United States Product Type: Auto Part Item Package Weight: 1. I changed the DEF fluid level sensor, but the issue persists. May 25, 2025 · The DEF fluid pressure sensor is built into the DEF pump, which is attached to the rear of the DEF tank mounting brackets. The DEF Level Sensor is a critical component for Kenworth trucks' Diesel Exhaust Fluid systems, providing precise measurement of the DEF tank’s fluid level. Following the initial notification, the operator has a period of time to address the issue before the first engine derate. It detects the Urea concentration in the DEF. 00 View Details Add to Cart DEF Pump Module and DEF dosing valve inlet screen must be replaced. If your diesel exhaust fluid level sensor is not functioning as it should, try our quick tips for cleaning to get you back on the road as soon as possible. Explore the myriad of kenworth def quality sensor location options, with the ability to refine your search for personalized choices. Paccar 2005-2010 Multiplexed Electrical System Sevice Manual [PDF] 6. Inspect the DEF dosing valve and quality sensor for contamination or damage. What's up Youtube Family, in this video the Def quality sensor goes out while I was getting loaded, I had to cancel my loads, but we were able to fix it that night. The DEF Quality sensor is mounted on the side of the DEF tank. Start by verifying the DEF fluid meets ISO 22241 standards. Kenworth Trucks The DEF quality warning in a Kenworth T680 can stem from contaminated or poor-quality DEF fluid, faulty DEF sensors, or injector issues. How To Remove A Radiator in 60 Seconds on A Semi Truck DEF Tank Quality Sensor/QLS/DEF Header Replacement Like Dislike 31 Aug 31, 2022 · Another reason would be the quality of the DEF fluid you run through the system. Aug 23, 2024 · Fault code SPN 3515 FMI 10 indicates a problem with the DEF quality sensor in vehicles equipped with a Cummins engine, such as Volvo trucks. Heavy Duty Body Builder. A poor DEF quality condition will require the DEF tank to be drained, flushed, and refilled with new or known good-quality DEF. Feb 12, 2011 · DEF level/quality sensor replace on 2021 Pete O/OP w/sleeper. Plus my truck keeps de rating after 30mins into driving and 2nd engine light is on help plz. May 5, 2021 · So here i sit yet again with a max derate on my new pete after yet another dealer claimed they fixed it, (8 and counting at this point) So far i have had the whole system pulled and cleaned by pete, replaced the quality sensor, doser, both nox sensors the SCR sensors, Soot can, Def filter, DPF filter, wireing harness, ECM, pump, cooler, ALL of the lines, injector, fuses, fuse box had the tank The DEF fluid pressure sensor on the 2013 Ford F650 with Cummins 6. Mechanic's Assistant: What is the current In this video we tackle the #1 Problem on DEF and DPF Systems and offer some secrets and solutions on getting these problems fixed! There are many problems with these systems, but this seems to be The DEF filter should be replaced routinely (see your engine operator's manual for frequency). Clean or replace sensors if needed. This manual contains useful information for the safe and efficient operation of this equipment. Check the terminating resistor at the pump for correct resistance (~115 ohms). This smart sensor has Urea Quality, Level, and Temperature all integrated into it as one unit and reports on the DL7 (J1939-7) Datalink. DEF pressure line, between DEF dosing unit and DEF dosing valve must be flushed with distilled water to remove any residual debris. q21-6170-k1t is A DEF (Diesel Exhaust Fluid) sensor is a critical component in modern diesel engine vehicles, particularly those equipped with Selective Catalytic Reduction (SCR) systems. In this video I am replacing the def level and quality sensor, it is difficult to do without dropping the fuel tank but it is possible. Def level guage was reading Inspect the DEF level sensor for any signs of damage or malfunction, such as cracks, corrosion, or loose connections. This plays a pivotal role in controlling emissions and ensuring compliance with environmental regulations. Can you tell me if there Paccar Diesel Exhaust Fluid (DEF) Quality Sensor measures fluid concentration and alerts user if solution deviates from acceptable range. Search our large inventory of New/Used Kenworth T680 DEF Sensors for sale. For a 2017 Kenworth with a flat horizontal DEF tank, identify the tank part number by checking the stamped label or OEM catalog. Accurate detection by this sensor ensures that the aftertreatment system functions correctly, helping to reduce emissions and maintain engine efficiency. 2018 Kenworth T880 vin***************** Cummins X15 No 12v supply to the def quality sensor. If the DEF level is still low or the gauge readings are still inaccurate after replacing the DEF level sensor, there may be another issue causing the problem. efzabq7bu etyakb1q8 cu8v 5xm undsw sil znctx 84s regztl y8mzruuan