Freightliner def tank heater valve It consists of an electrically powered control valve that regulates the flow of engine coolant to a heating coil inside the tank. I can explain how a DEF system used with a Cummins would work. 5 GAL. Typically just a tube that coolant runs through to transfer heat into the DEF. Disconnect the DEF lines (3,4) between the DEF pump and the tank. Capacity has stood the test of time in the harshest environments, building its reputation with superb design and innovative engineering. If inactive codes persist and forced regen is blocked due to SCR derate, inspect DEF quality and sensor signals. Disconnect the DEF lines between the DEF pump and the metering unit. Check the connectors for corrosion and the line resistance, sorry I'm not computer savvy enough to post the schematic. The header Explore our collection of freightliner def tank heater control valve recall to find the perfect solution and get back to adventuring! Replacing the DEF tank header on a Freightliner M2. I’m having an issue with the DEF Heater Lines all 3 of them (faults see pic). The tank heating coil is internal to the diesel exhaust fluid tank. com Google The Gentech diesel exhaust fluid (DEF) coolant-flow-control solenoid is an electric 12V solenoid that controls the flow of coolant through stainless steel tubes in the DEF tank. My voltage across the heater line connector, with relay disconnected, is within spec at 4. Feb 5, 2012 · I have a 2011 Freightliner Cascadia with DD 13 I am trying to T/S a code 4364. Details DEF COOLANT CONTROL VALVE Blaine Brothers is proud to be a Capacity authorized dealer. 6. In this video we're going to be looking at a problem with a DEF Tank Heater Valve (SPN 3363 FMI 5 & SPN 3363 FMI 3) but really, these issues apply to so much more. This maintenance manual provides information necessary for years of safe, reliable, and cost-efficient vehicle operation. The truck will remain in a derate condition until the temperature stays below 122 degrees. M2 models may face DEF doser heater relay failures and clogged DEF dosing valves causing system errors. The UAC brand has been trusted by mechanics and vehicle owners around the world for more than 30 years, offering the perfect fit at an affordable price. There are five different “heaters” in the DEF system. While running the Detroit troubleshooting program it tells me to disconnect the DEF doser valve electrical connector before running a Regen. Cover the DEF line with a plastic bag and secure the bag with a tie wrap to prevent spillage on nearby components. I can not find the connector . TANKS. Test voltage supply at the relay socket and verify proper relay operation. Note: If the DEF line will remain open for an extended period of time, seal the opening to prevent 2 days ago · I want to personally thank everyone who has donated to the forum recently. Please review photos and double-check compatibility before purchase. Specific locations will vary depending on the OEM. A heater resistance of 1. The DEF fluid level in the tank will need to be manually inspected to allow proper vehicle operation. To fix a coolant leak near the def tank line, first locate the leaking hose or fitting. Regularly check DEF Sep 10, 2023 · Unfortunately DEF tank heater control valve failures are fairly common and when they fail they fail open, cooking the DEF and rendering it ineffective and causing all kinds of emissions system havoc. The DEF tank and bracket assembly are heavy. The control valve for the diesel exhaust fluid tank heater could be malfunctioning. Outlet - DEF supplies to the aftertreatment DEF dosing valve. Inlet - DEF supplies to the aftertreatment DEF dosing unit. New Cascadia AfterTreatment System DEF Tank - 13 & 23 Gallon Coolant Valve, DEF Header & Heater Line Connections Freightliner M2 106 DEF Misc Parts, P/N 04-33700-000 for sale. If a vehicle is showing this symptom, perform the inspec-tion below to determine the cause of the excess moisture For code 4169, check the DEF dosing unit heater fuse and relay located in the engine fuse box. Jan 7, 2025 · When your Freightliner Cascadia with a Detroit Diesel DD15 experiences DEF (Diesel Exhaust Fluid) system issue, it can disrupt your operations, decrease fuel efficiency, and lead to costly repairs. Of course this also means no DEF consumption. 4 days ago · CARDONE Diesel Exhaust Fluid (DEF) Heater include all necessary gaskets and O-rings needed and are quality tested to ensure easy installation and reliability. Ensure the DEF tank heater wiring harness and connectors are intact. Foreword Scheduled maintenance provides a key element for the safe operation of your vehicle. com. Aug 21, 2023 · To avoid issues relating to the DEF pump and the DEF system in Freightliner, ensure that you maintain preventive operation and proactive monitoring procedures. Buy DEF Tanks & Components from top brands at the bigrigworld. Clear the code using a diagnostic tool; if it persists, inspect wiring harnesses for shorts or corrosion. Circuit Description The aftertreatment diesel exhaust fluid tank heater prevents the diesel exhaust fluid from freezing in the tank. The solenoid is checked every time the truck is started and is used when the DEF temperature drops to its freezing point, 12°F (-11°C) or below. The DEF header unit on vehicles with a six-gallon DEF tank is secured to the top of the tank, and contains the DEF level sensor, DEF temperature sensor and coolant and DEF lines. NOTE: If petroleum is found in the DEF, the entire system will need to be replaced including the tank, pump, heater/sender, heated line and injector. Shop our Freightliner heater coolant flow control valve inventory at FinditParts, America's online marketplace for heavy-duty parts with part number lookup, cross-reference search, and more! Nov 24, 2019 · I mean can the sensor be cleaned or what? I was reading up somewhere that it has to do with the silicone chip inside basically getting to hot from the coolant lines and causing the chip to fail. ,7 GAL. Note: If the DEF line will remain open for an extended period of time, seal the opening to prevent Dec 13, 2014 · The DEF line heaters are controlled by the aftertreatment control module mounted on the left side of the DEF tank. In the case of freezing temps, the monitor opens a valve that allows engine coolant to flow through the heating tube in the header, which warms the DEF and keeps it from Jul 2, 2021 · The heater control valve is the coolant control valve that is used to allow hot engine coolant to circulate through the tank on very cold winter days to prevent DEF freeze ups. Potential causes of this issue may include: A faulty line heater relay A defective line heater The attached image is incorrect. Component Overview The Diesel Exhaust Fluid (DEF) Pump's function is to build and regulate the DEF systems pressure that is supplied to the dosing valve. Search our inventory for Freightliner 114SD used, new, rebuilt, quality inspected salvage parts for sale. The diesel exhaust fluid tank heater control valve can be powered by an oem supplied power relay, which is connected to the aftertreatment diesel exhaust fluid controller harness. Most of it sits inside the DEF tank, but its DEF lines, valves, O-ring, part of the level and temperature sensors and part of the coolant lines emerge from the top. The DEF Heater Valve plays a crucial role in the Diesel Exhaust Fluid (DEF) system by regulating the flow of heated coolant to prevent DEF from freezing, ensuring optimal performance of the vehicle's emissions control system. Customer: Fault Code # 1683 is active. 7isb spn 4344 fmi 5, DEF tank is heated with coolant lines and DEF pump and doser valve are Find many great new & used options and get the best deals for OEM Freightliner 04-28039-000 Def Tank Header Urea Valve M2 at the best online prices at eBay! Free shipping for many products! Jul 25, 2021 · iRV2 Forums > THE OWNER'S CORNER FORUMS > Entegra Owner's Forum New information on the DEF head issue iRV2. com Google Freightliner DEF line heater 1 , power supply 2 heating element failed Sep 22, 2012 · Hello, I've got a CEL and a SPM code of 3031 which is invalid DEF tank temperature. See Fig. DEF freezes around 12*F and will turn to slush before freezing. When these lines are worn The tank heater consists of an electrically powered tank heater control valve that controls the flow of engine coolant to a heating coil inside the DEF tank. Ex-cessive crystal buildup (caused by the evaporation of DEF when exposed to the air) and/or dampness is an in-dication of a leak. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and then closes when heating is no longer required. After replacing the valve, clear codes using a diagnostic tool. ESN: 73896195 Active Fault Codes: 3258, 3714 Inactive Fault Codes: 5278 I have a code for heater line 1 open circuit. Since 1971, Capacity sets the standard in what customers look for in yard trucks and yard truck parts. This is typically caused by a malfunctioning DEF tank heater valve located on top of the DEF tank header. Specific location will vary depending on the OEM. Live TV from 100+ channels. Cancel anytime. To order these parts, call Kent-Moore at 1-800-328-6657. Mar 6, 2019 · Yes what he is saying is true, when you shut down the engine you hear the def pump for about 3-5 minutes as it purges the def from the lines, and when you say harness that is the oem (freightliner)harness that plugs into the def line heaters, the line heaters consist of a small heating element at each end of line and it is kinda like a heat tape that wraps the whole length of the line as well Rhino Tuff Tanks Stainless Steel 4 Key System Container Valve for DEF Closed Loop Systems - 2 in. Several Blockage of the DEF supply to the pump ( DEF tank vent, DEF tank filter, DEF pump inlet screen ) mostly caused by debri or urea crystals. 3v drop. But when it's time to service any of these trucks, it also provides customers with the parts they need right when and where they need them. Yesterday I get a check engine light and a 3363-16 error FC1715: Aftertreatment Diesel Exhaust Fluid Quality - Root Cause Not Known Root Cause These fault codes can be caused by an aftertreatment diesel exhaust fluid (DEF) tank heater coolant control valve that is not closing completely. Jul 12, 2017 · At the ACM the large bundle of wires comes off both the 21 pin (com/power) and 120 pin (sensor) connectors travels up the frame rail over to the top rear of the tranny, splits off the communication/power, splits off for the def pump/tank/line heaters, and sends still a large bundle of wires to the OneBox sensors and metering valve. Jan 19, 2022 · Buy 4460913070 Def Coolant Valve | 4460913070 online. The solenoid is controlled by the TSB170054-042020This technical service bulletin describes the verification and resolution of fault codes caused by an aftertreatment diesel exhaust fluid (def) tank heater coolant control valve that is not closing completely. com store at attractive prices! We'll help you with choosing the right part for your truck. The DEF doser heater relay on a 2014 Freightliner M2 is typically located in the main fuse panel or relay box near the battery compartment. Perform the pretrip inspection and daily maintenance as outlined in the Saf-T-Liner C2 School Bus Driver’s Manual. Is there anything I can do to remedy this short of replacing the sensor? Check connections etc? Where is the sensor located? Thanks Also SPN 1569 and 3363 which I believe are all related to this DEF tank temp. Enjoy our hassle-free online checkout or call to speak to an expert. DEF Coolant Control Valve | 151261 | Pkg. Inspect the DEF tank coolant valve supply lines for a restriction or closed shut off valves plumbed into the cooling system. Fault Codes 3868, 4572, and 4677 Caused by Diesel Exhaust Fluid (DEF) Tank Heater Control Valve Stuck Partially Open Commonly referred to as the "DEF Fluid Heater," this unit is situated in the DEF (Diesel Exhaust Fluid) tank and includes the pickup tube for the reductant pump module, an electric heating element, a temperature sensor, and an electrode-type level sensor. Hey Truckers! Today, Jose walks you through how to replace the heat shield near the DEF Filter, how to access the DEF Filter and what it may mean when you receive the error code DEF Line Heater. The def tank heater valve is a normally closed valve. Jan 22, 2015 · Universal Air Conditioner ("UAC") is an industry leading full line manufacturer of aftermarket air conditioning parts. Flush the hydraulic system. After replacing the valve atop the DEF tank, ensure all electrical connectors are secure and undamaged. The heating coil is located inside the diesel exhaust fluid tank. Apr 30, 2018 · IMI Norgren Urea Tank Heating Valves help to keep the DEF flowing and reduce emissions in North America and throughout the world. 2017 Freightliner M2 Cummins DEF Heater Valve and Header Replacement, Codes 1679, 4243, and 1713 more Search our large inventory of New/Rebuilt/Used Freightliner M2 106 DEF Misc Parts for sale. Proper troubleshooting Freightliner® is the best-selling brand of heavy duty trucks in North America. - Thank you again. Possible causes of this fault code include: The signal wire and return wire for the diesel exhaust fluid tank heater may be shorted together. Are there any restrictions present? Fixing the DEF system on our Cascadia. Circuit Description: The aftertreatment diesel exhaust fluid tank heater prevents the diesel exhaust fluid from freezing within the tank. What should I do next? General Information In the event that the heater return pipe (HT2 line) fails on an EPA07 HDEP engine, replace the line with a new assembly that connects to the manifold with a hose and hose barb. Any of you Detroit or Freightliner guys know it's location ? Jul 28, 2021 · iRV2 Forums > THE OWNER'S CORNER FORUMS > Entegra Owner's Forum Adding a DEF Coolant Loop Shut-Off Valve iRV2. Per the schematic I have traced my fuse (ok), Relay is ok, terminals at relay ok, jumped wiring and got my supplied 12V voltage at all 3 wires at Heater line connectors. pair, one is agreeing to make the vehicle available at a later ate once DEF header parts are available. . Overview During testing of the DEF dosing valve with Guided Diagnostics, certain observations and normal behaviors of the valve can be mistaken for symptoms of a malfunction. Resetting the aftertreatment control module may be necessary. DEF Hose and Tubing Essentials That Keep Systems Flowing Effective diesel exhaust fluid systems rely on secure and well-maintained connections between their core components. Discard the lines. Have a crane carrier garbage truck that is fitted with an ISL cm2350a. NPT Thread Feb 1, 2025 · Circuit DescriptionThe aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. Remove the 4 nuts retaining the DEF tank bracket to the frame rail and retain for reinstallation. 12-pin electrical connector. Find many great new & used options and get the best deals for Epa10 Freightliner CASCADIA Def Tank Heater Valve Repair Kit A04-31573-000 at the best online prices at eBay! Free shipping for many products! Blocked or restricted coolant flow to the diesel exhaust fluid tank heater. Open the bleed valve on the bleed tank of the adaptor. Dimensions: 6 x 6 x 6 | Weight: 2 lbs | Questions? Call 1-800-445-1141 Jun 20, 2024 · I have a 2015 London Aire on freightliner chassis, I had a low def error when gauges showed plenty of def. If the DEF heater isn’t activating, check this relay for continuity and signs of corrosion or damage. Push the quick connect fitting coupling in the ON direction, squeeze the holding clip lugs on either side of the connector and pull to disconnect the DEF line from the dosing valve. 21 lbs 2017 Freightliner M2 Cummins DEF Heater Valve and Header Replacement, Codes 1679, 4243, and 1713 Fault codes 1713, 4243, and 1679 typically indicate issues with the DEF heater circuit or sensors. Your Freightliner dealership has qualified technicians and equipment to perform this maintenance. Several 13 freightliner m2 6. Free shipping on many items | Browse your favorite brands | affordable prices. Jan 19, 2021 · The DEF tank heater valves are still failing, although apparently infrequently, and that will kill a DEF head. If the DEF tank vent has its own filter ( mainly for dirty environment ), make sure to check the filter and lines for any blockage. A future communication will be sent to make these arrange Feb 1, 2018 · The only responses I care to here are solutions to my questions on an auxilary tank heater and if anyone has actually tried something or seen something that works? I did not find any aftermarket def tank blanket heaters etc except those designed for fuel stations to install over a much larger tank This genuine Freightliner DEF tank heater/sending unit is a good used part. NOTE: A pressure bleeder hose (J-29532) and a bleed adaptor (J-35798) for the fluid reservoir are available through SPX Kent-Moore Tools and may be used to complete the following pro-cedure. 8. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction according to the procedure below. See Table 1 under "Parts" for a list of the original parts and required replacement parts. No cable box or long-term contract required. Either inaccurate def gauge or coolant leak at top of sending unit. 2017 freightliner m2 cummins def heater valve and header replacement, codes 1679, 4243, and 1713. Here is the correct location: Backflow - DEF returns to the DEF tank. VALVE,DEF TANK HEATER,5 GAL. Freightliner told me not to worry about it as I was headed south to Gaffney at the time. Disconnected or broken tank heater coolant supply hose. My return wire from Allow me a few minutes to take a look. 18 . The header is responsible for being the pickup for DEF as well as the tank Level sensor, fluid quality and temp sensor. May 17, 2024 · We have a 2014 Phaeton that had its DEF head unit (Freightliner part # A04- 27445-000) replaced in the spring of 2021 after a component within it cracked due freezing. 4064184C1 DEF Tank Heater Valve is a genuine Navistar International® part, VMRS: 999-999-ICC, Cross References: JB HUNT 59025,\\nJB HUNT 59025, OEM Description: VALVE,SOLENOID , TEMP CONTROL, Weight: 1. There is a heater coil in the DEF tank. Verify the valve operates correctly by testing voltage and resistance. It consists of an electrically powered control valve that regulates the flow of engine coolant to a heating coil within the tank. 2. Remove the DEF lines and coolant lines from the DEF tank sender. Freightliner DEF tanks & headers built for durability and emissions compliance. Aug 17, 2022 · What is a DEF Header? A DEF header is an L-shaped part made up of level, temperature and quality sensors, coolant lines and suction tubes. Paccar runs coolant through the tank to warm the DEF in a defrost cycle. The diesel exhaust fluid tank heater control valve can be powered by a relay supplied by the manufacturer, which connects to the aftertreatment diesel exhaust fluid controller harness. The voltage drop across the circuit was only a . Start by inspecting the DEF heater element for continuity and damage. A small amount of white crystal or powder around a DEF fitting is normal. Freightliner Valve Solenoid RH Used - Has Signs Of Wear - See PhotosValve - Solenoid, Coolant, Diesel Exhaust Fluids Tank, 3. Disconnect the DEF line heater wiring harnesses (1) at the tank and the pump. 9. Every key cycle the ECM verifies the coolant valve that controls flow by opening and closing the valve and watching the temperature rise. There is an output for lines 1&3 and another output for line 2. Description: DEF Heater Control Valve On 12 Voltage Condition: New Brand: Paccar® Part Number: 5502-17 Manufacturer information: Headquartered in Bellevue, WA, PACCAR® is a Fortune 500 company specializing in heavy duty commercial vehicles. The vehicle is in complete derate mode and will not go over 5 mph. Three What does the exhaust fluid tank heater control valve look like, and where is it located? Also, where can I find the after-treatment diesel exhaust fluid controller with 86 pins? Am I supposed to test for ohms or voltage? Nov 4, 2020 · Hello, Two years ago I got a DEF heater low temp code (not the code in the Title) in colder weather. Refer to the appropriate OEM wiring diagram when troubleshooting circuits that use wiring provided by the OEM. 4 ohms is normal, so inspect wiring harnesses for shorts or grounding issues. The dosing unit refers to the pump situated at the bottom of the DEF tank. Malfunctioning or stuck closed diesel exhaust fluid tank heater control valve. Using a jack or assistant, lift the DEF tank and bracket assembly off of the frame rail and set the tank and assembly on the floor. Petroleum contamination is non-warrantable. 99 Free shipping Sponsored Strap on and hot that like button------ How to replace a def level unit/sending unit/header unit from a def tank. The preemptive solution to this is to install an external valve in the DEF tank engine coolant supply line and keep it off unless you need it, or by-pass it all together. Nov 21, 2019 · DEF Tank Heater (CES to integrate w/OEM) DEF Tank Heater Relay/Valve DEF Line Heaters DEF Lines to/from DEF tank to Aftertreatment DEF Dosing Unit DEF Line from Aftertreatment DEF Dosing Unit to Aftertreatment DEF Dosing Valve Coolant Lines to/from DEF Tank Coolant Lines to/from Doser Nozzle Code 3576 indicates heater control valve faults affecting DEF tank temperature regulation. Customer: I have a 2011 Freightliner M2 with a Cummins engine. CR. Perform the maintenance operations in this manual at scheduled intervals based on the distance the vehicle has traveled or hours of operation. Dec 16, 2023 · The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. I'm seeing the following codes: SPN 3031 - FMI 18, SPN 4342 - FMI 5, and SPN 5246 - FMI 0. With the air system charged to 120 psi (827 kPa), check for air leaks at the fan clutch, sole-noid valve, air hoses, and fittings from the fan clutch to the air tanks. The com-mand is controlled by the Cummins engine controller. 54 VDC. Aug 27, 2025 · Freightliner Cascadia DD13/DD15/DD16 DEF Tank Heater Valve Repair Kit. I've already replaced the heater control valve on the DEF tank. General Information Some EPA10 vehicles with HDEP engines and WABCO or Bendix air dryers are experiencing excessive mois-ture in the air system, possibly resulting in a DEF system fault code (see Table 1) and/or a clogged air inlet screen (DDE A0001400594) in the DEF metering unit. Replacing the def tank header on a freightliner m2. Step-by-step guide to remove and replace Freightliner Cascadia DEF coolant hose. Inspect the coolant reservoir and connecting hoses for cracks or loose clamps. The DEF Pump is a multi-unit component that consists of: General Information Leaks in the the diesel exhaust fluid (DEF) system are usually attributed to three sources; normal seepage, im-proper connections, or damage. 3856343C2 Def Valve Buy Truck Parts. com Google Failure to properly remove a DEF line can result in damage to a line coupling or DEF port. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction according to the procedure be Jul 28, 2020 · I have had a DEF tank heater valve stuck in open position, replaced on June 2, then less than 1000 miles same Malfunction light and yesterday same thing which was replaced at Salt Lake City. Please like and Learn more Freightliner Engine Supply Coolant Line To the Def Tank, These two lines that run from the right side of the engine on top of the transmission to the Def tank. ,AND 9. Noun: 751 - Hose, Coolant Valve to Tank Note: If problem is found, put iKnow article in claim comments section. Jul 28, 2020 · I have had a DEF tank heater valve stuck in open position, replaced on June 2, then less than 1000 miles same Malfunction light and yesterday same thing which was replaced at Salt Lake City. Also, examine connectors for corrosion or damage. Yes, either is gets too hot from the Def tank heater valve failing or to high of ambient temperatures heating up the def and wrecking it. BEFORE replacing any according verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction to the procedure below. The DEF tank heating and sending unit has been replaced, along with the three DEF heating lines and the harness for a 2018 Freightliner Cummins L-9. Oct 15, 2021 · Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts. The replaced the def head on June 4. Jul 2, 2021 · The heater control valve is the coolant control valve that is used to allow hot engine coolant to circulate through the tank on very cold winter days to prevent DEF freeze ups. Same day shipping available on most parts. The Gentech diesel exhaust fluid (DEF) coolant-flow-control solenoid is an electric 12V solenoid that controls the flow of coolant through stainless steel tubes in the DEF tank. Keep your truck running efficiently with quality parts—order today! DEF Heater line issue. It helps pay for the $790/month internet bill that the forum consumes. Jul 28, 2021 · iRV2 Forums > THE OWNER'S CORNER FORUMS > Entegra Owner's Forum Adding a DEF Coolant Loop Shut-Off Valve iRV2. DESCRIPTION This document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. View and Download Freightliner Business Class M2 instruction manual online. The dosing valve, or doser, is installed on a pipe (decomposition tube) that connects the DPF and SCR. Hose, tubing, and piping elements within these systems serve a crucial role in transporting DEF fluid from storage to injection points, helping trucks meet emissions standards and operate cleanly. Apr 23, 2018 · DESCRIPTION This components, document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. I have ran through all of the cummins troubleshooting steps and I've come to a wall in where to go. NOTE: The example used below is a typical DEF tank EZWiringTM makes Freightliner Custom Chassis Corporation, Freightliner, Ster-ling, Western Star, and Thomas Built Buses products’ wiring drawings and float-ing pin lists available online for viewing and printing. Dec 18, 2019 · Monitoring the temperature of the DEF in the tank, Warming the DEF when the outside temperature gets into the freezing levels, Monitoring the quality of the DEF in the tank. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction according to the procedure be Oct 1, 2021 · Freightliner Trucks is currently the largest manufacturer of heavy trucks in the United States with more than 22,000 employees and an annual turnover of over $ 32 billion. Coolant flow is controlled with a solenoid operated shut off valve. Sep 22, 2012 · Hello, I've got a CEL and a SPM code of 3031 which is invalid DEF tank temperature. The diesel exhaust fluid (DEF) tank heater control valve is installed on the coolant supply line located near the DEF tank. Now the question becomes why the sensor failed. Replacing the DEF in the tank with known good quality DEF, replacing filters an screens should help fix this issue. 7. This is an update to a previously submitted communication. 5 MM, Right HandP/N: X09004-007O Get the best deals on Freightliner Commercial Truck DEF Systems when you shop the largest online selection at eBay. UAC parts are manufactured and tested to meet or exceed OE specifications. Nov 24, 2019 · I mean can the sensor be cleaned or what? I was reading up somewhere that it has to do with the silicone chip inside basically getting to hot from the coolant lines and causing the chip to fail. Oct 17, 2025 · Freightliner Water Supply Valve 04-33700-000 - DEF TANK COOLANT VALVE $69. A proper maintenance program also helps to minimize downtime and to safeguard warranties.