New Diesel Exhaust Fluid (DEF) Controller Causing. 06-10-2022, (Subject: Poor DEF quality no check engine light). A contaminated SCR box can prompt a Poor DEF Quality alert. Poor def quality detected engine in derate box. Go over your exhaust, DEF, EGR, and SCR systems. I happened to leave my tank uncapped spilling def out of the tank fill port on my truck. When there are failures in your EGR cooling system, coolant can get into the exhaust and reach the after-treatment system of your vehicle. This allows the vehicle to set a code for the empty tank level.
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There are other options. After driving for 60 minutes, I got a reading on dash, %25 derate and then it disappeared 5 minutes later. It can affect the pressure and temperature in the exhaust resulting in maintenance & repair problems and performance issues. What Does Poor DEF Quality Detected Means? Told them I have never seen this truck do this before. What Does Poor DEF Quality Mean? (How To Fix Poor Quality. The Diesel Exhaust Fluid, or DEF, is a chemical solution made of 67.
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But it really helps to keep the def tanks full, As the level drops the def will crystalize in the tank and can cause the level sensor to get stuck and or not read correctly. To fix this problem the first attempt is to drain the DEF, fill it with new, then change the filter, and do a parked regen. The concentration will be the same. Look for existing leaks, crystallization, blockages, corrosion, and possible wear. Diluting it with more water will decrease the NOx neutralization properties. This may have purged some bad deff by accident. If you're anywhere in this situation, this article will help you understand poor DEF alert and what you can do about it. Poor def quality detected engine in derate water. However, it will stop engine operations as the SCR system does not work with solidified DEF. For people with a warranty on their truck and emissions systems still)... Truck came in derate with no communication to aftertreatment module. Having other fluids present, like diesel, engine oil, or coolant, will damage your SCR and cause the engine shut down. It must contain no other liquid or contaminants other than its composition. Better yet, call your service workshop for scanning.
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4, Fault Code, Error, New Fault Code... 72, 3425, Aftertreatment Diesel Exhaust Fluid Line Heater 3 Circuit - Current Below Normal or Open Circuit, 6484... If you go to the dictionary, you will find that the term 'poor' means in bad shape, not up to standards, or not looking very good. Post: #6. yeah thats not good. Potential EGR issue. DEF rep[airs can get expensive if you do buy the lower-quality version. Mar 7, 2022 · 3261, and 3425. The high heat damages the sensors.. DEF liquid should be clear. DEF - "Poor DEF Quality Detected" now what. › Car Questions › Truck Repair. The problem is so bad that cummins themselves has a program update/patch to allow someone to drive if it is only that one bad sensor and the CEL light staying on, without it shutting the whole truck down. Dash lit up with message piir def quality and gave me a 2 hour timer for derate. While there are many advantages of using DEF liquids, the SCR system and Diesel Particulate Filter (DPF) have some issues to watch out for since they tend to clog over time.
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How to Keep the Good Quality of DEF? This may be costly but that depends on the mechanic you are working with. What you can do is, let it thaw normally until it liquifies to its original state. Poor def quality detected engine in derate cars. Cummins Tier 4 Fault Codes. For a well-versed driver, the first notification is a sign to make a visual inspection of the DEF tank or at least head to the nearest truck shop. Coolant, fuel, and engine oil can get into your after-treatment system don't only affect its processes by its components as well. An open circuit or short circuit to ground has been detected in the aftertreatment DEF controller harness line heater power supply circuit.
My def level has gone down and truck is performing as usual. I have not ran into this problem again. Any contamination should not get into your SCR box as it can cause huge costly repairs. Just got this message today along with the constant flashing exhaust symbol. When it detects irregularities, it can send signals to the ECU, and the computer regulates the engine's speed to as slow as 5 mph or shut it down. The common causes of faulty NOx sensors are moisture contact from the exhaust or during replacement and soot build-up. Some of those DQS sensors are sometimes fetching more than $3, 000+ for just a used one out of a junk yard, due to the over-demand. I'm going to have them look at it tonight. What are your expos on it? Your DEF liquid should keep its concentration to the standard, 32. DEF liquid has a clear transparent liquid.
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