Common questions

Can DEF freeze?

Can DEF freeze?

Diesel Exhaust Fluid or DEF Fluid Whether in storage tanks or in equipment, DEF can freeze and possibly cause issues. As temperatures drop below 12°F, DEF will begin to solidify and not work as intended. The specific ratio used allows the whole mixture to freeze and thaw together like water and ice.

Can a service DEF system see a dealer?

Got this message today (“Service DEF System See Dealer :confused013 on my truck and I’ve researched it but have not found any definitive answer on what it could be!!! My def tank still shows 1/3 full and I haven’t had any problems driving it.

Why do diesel trucks use the DEF system?

A large fleet of trucks using the DEF system will use a lot of it, this has to be refilled on a daily basis. If the fluid is not properly stored it gets contaminated very easily which will cause all sorts of problems with the truck. Diesel Exhaust Fluid or DEF for short is a colorless liquid which contains water and Urea solution.

Why do I need to refille my Def system?

A large fleet of trucks using the DEF system will use a lot of it, this has to be refilled on a daily basis. If the fluid is not properly stored it gets contaminated very easily which will cause all sorts of problems with the truck. What Is DEF – (Diesel Exhaust Fluid)

Is the Def / SCR system a good idea?

The DEF system when working correctly does its job, but its so complex with all of it sensors and different modules that all send the CAN signals back to the ECU. These can be very costly to repair with a SCR ECU costing approx 5k, this is why we sell our DEF delete module. Is DEF Delete A Good Idea?

What does service DEF system, see dealer mean?

For the next 2400 miles no issues then the CEL popped on with the message service DEF system see dealer immediately. They found a stored code for a bad Nox sensor so they ordered up one and two weeks later when it came in they installed it and no more issues since I’m at 5010 miles now.

What does Def indicate on a diesel engine?

Four Stages Of DEF-Related Warnings. How To Perform A Parked Regeneration. Lamp Description DEF Gauge Driver Action 1. 2. 3. 4. Solid Diesel Exhaust Fluid (DEF) Lamp DEF level is low. Solid DEF Lamp and Check Engine Lamp Indicates lower DEF level, incorrect DEF type or an SCR system issue. Driver will experience a mild loss of engine power.

Why was my service DEF system turned off twice?

Completely a software issue This happened to me twice the first time was at 1200 miles and was right around the time they came out with a flash update to change the sensitivity for the sensors in the exhaust system so dealer turned off CEL and performed that update.

Can a service DEF system go into limp mode?

The Def system gauge shows it’s almost 100% full and it did not give me any kind of message about going into limp mode. Can this message reset itself if it corrects itself or is it one of those things that is going to have to be reset regardless?

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Ruth Doyle