Hello Everyone, I have a 2020 Sierra 2500 Duramax Denali, 27,000 miles. The DIC is showing the following two messages, (Service Emission's System, 175 mi Until 65 MPH Max Speed). The dealer picked it up and gave me a loaner vehicle. They called and said the DEF tank needs to be replaced, warranty will cover everything.Unfortunately once it reaches speed limited to 5mph, there is no manual/diy reset for this. It has stored fault codes now that the regular def fluid reset will no take care. At this point, the ONLY way to reset the system, including erasing the codes and resetting the lights and restoring power, is with a Mercedes STAR diagnostic scan tool .How To Fix Scr Production Low Veh Limited To 5mph & ATS Engine Reducer - Trucks - Nairaland. Nairaland Forum / Nairaland / General / Autos / How To Fix Scr Performance Down Veh Limitation To 5mph & ATS Type Derate (762 Views) . Toks 3540 Toyota RAV0 Limitation To Sale / Extremely Clean And Sound Firstbody Registered 3047 Lexus …Whenever adenine truck is stock to severe derate is simply means the program inside your truck computer is limitations your trucker to certain speed to avoid limit to your engine of emission arrangement. HERE ARE THINGS TO CHECK WENN YOUR TRUCK ENTERS DERATE/5mph. * Doser valve * X sensor * Def fluid gauge * Input & …Your P220013 fault code is for inlet nox sensor. This means the nox sensor is defective. This nox sensor is located at the base of the dpf housing. Once the sensor is changed there is a reset that will need to be performed with a service tool. Then a nox conversion test can be ran. This will verify that the sensor is reading and take the unit ...Has just picked up a 2020 Silverado from the auction with DEF system issues.Service DEF vehicle speed limited to 5 mph. Removing the speed sensor does not resolve the issue. Volvo D13 SCR system ...Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope that you can help me ... I have a message on my dash that says Service DEF veh speed limited to 5mph ...Until your technician replaces the def tank pump/sender (heater 1 assy) Special policy 14652 (came out 7/7/15)and performs a manual heater 1,2,3 command in the glow plug control module you will be limited to 55mph. You can do as many fluid quality and service regens as you want and it will never reset.After a few miles got the 5 MPH max speed in 125 miles service DEF system . At that point I was too far from my home dealer, and close to where we were going on a hunting trip, so hunting we went. Called a dealer from the hunting camp that was within the 110 miles that I had left on the countdown , and asked about the particulars, and what had ...According to the Governor’s Highway Safety Association, each individual state is responsible for setting its own speed limits. This means the speed limit in residential areas diffe...Feb 5, 2020 · 2016 Volvo VNL670, D13 “Service DEF, speed limited to 5 mph” message ... 8,454 satisfied customers. I have a message on my dash that says Service DEF veh speed.Then it went into derate i pull the speed sensor snd drove from Birmingham al to my shop/yard in atlanta ga. The shop did scr crital.... and forced regen so level went down but i got stuck with "service def veh speed 5 mph " so while doing regen the temps were going up very fast 1050 deg F and then drop and up and down.Are you tired of slow internet speeds? Are you looking for ways to boost your internet connection? Look no further than Optusnet. With its reliable service and advanced technology,...how to fix or get rid of derated 5mph speed on Volvo vnl 670, 770 and other trucks like kenworth Freightliner, Westernstar. ACM fault, poor def quaility, or ...Jun 15, 2020 · Yesterday I filled the def tank with eight gallons of def. This morning the def light is flashing along with the check engine and stop light on this 2015 freightliner. The def gauge says full. Company road service thinks I am stupid and put diesel in the def tank but at least is sending out a TA service truck to come see what is wrong with me.Nov 12, 2019 · Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope ... I have a message on my dash that says Service DEF veh speed limited to 5mph ...missouri academic all-state softball 2021 » service def vehicle speed limited to 5 mph reset. 0 ...I have a 2012 Volvo 780 with a d13 and a 10 speed manual transmission. My DEF fluid sensor is showing empty and it put me in derate 5mph Max mode. I have disconnected the speed sensor from transmission to get around derate untill I can get to dealership 100 Miles away. It seems my rpms are limited to about 1500 is this normal?2017+ Super Duty - 2020 F350 6.7 speed limited to 50mph - Due to a DEF problem. I ran the truck out of DEF and it got limited, truck sat outside in the cold for a couple days, filled it up, DEF gauge reads full but it still gives me the derate. Tried pcm relearn with forscan and no luck. Drove it 60 miles and still...Good morning sr, I have a 2016 mack 600 cxu, with a MP7, dash show me “service def, veh speed limit 5mph”, i have a 2020 snap-op pro-link edge, i scanned and show me 1 active code: DTC p103c, and 5 inactive codes: DTC p1140, DTC p05e4, DYC p04DD, DTC p04d9, DTC p0401, i erased all the codes, and did a force regen, truck was like 55 min in that prosses, them, the truck is still with the ...Looking for the best direct mail services for small business marketing? See who's best for cost, speed, deliverability and more in 2023. Marketing | Buyer's Guide REVIEWED BY: Eliz...89 km/h (55 mph) Max Speed on Restart. The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously. Vehicle speed is limited to 89 km/h (55 mph). Warning Level 4.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...If it is to the point of being in 5mph derate, the only way to get it out of derate is with a service tool. You can disconnect the speed sensor and this will help you drive for a limited time. The derate can be linked to any of the following, Biased nox sensors, DPF passing soot, Def doser bad, Poor def fluid, Improper regen temps, Engine ...Aug 10, 2022 · WhiskeyThrottle. 486 posts · Joined 2016. #3 · Aug 11, 2022. I’ve heard rumor you can disconnect the rear abs sensor and it will stop the countdown at the current “miles till 5mph”? Yes it will throw other faults but can easily be reconnected. I’ve never tried this but read it elsewhere online.Truck in 5mph derate. Had SPN-5246-O, SPN-4094-14. Tested everything I could with PTT, EGR, turbo, doser, etc. Use scope to inspect SCR catalyst, checked/tested/changed DEF fluid, Cleared codes. 4094-14 would not clear, did multiple regens including sublimation regen, code would not clear. I am not sure on Mack regen …Feb 9, 2024 · Service DEF vehicle speed limited to 5 mph. Removing the speed sensor does not resolve the issue. Volvo D13 SCR system. - Answered by a verified TechnicianWelcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope that you can help me ... 8,454 satisfied customers. I have a message on my dash that says Service DEF veh speed.22 Jan 2022 ... ... K views · 3:38. Go to channel · Service def veh speed limited to 5 mph. Jj truck service / Jose Jimenez•16K views · 18:50. Go to channel&nb...5 MPH limp mode in 30 miles. I reposted in correct forum. I got the Service DEF message yesterday and this morning it went to the limited to 5 MPH in 150 miles. I got it to the dealer in Bay City Texas and he says his diesel mechanic quit a month ago and he cant service it. Nearest dealer is beyond my limp mode distance.I recently bought a 2014 Pinnacle day cab with the MP8 and Mdrive. Yesterday while pulling a load I got 2 messages simultaneously on the info screen. One said “low DEF quality detected, derate soon” and the other said “parked regen needed”. Eventually the truck derated and said “Service DEF, 5mph limit next vehicle stop”.Hello I have a 2015 Volvo with d13 Volvo engine on my dashboard say service def veh speed limited to 5 mph And I only have this active code p249f-00 Submitted: 8 months ago. Category: Medium and Heavy TrucksMar 22, 2021 · DEF Fault - 50 MPH Max. This morning while driving my 2017 popped up a message on the dash - “DEF Fault ...” - and said that it was going to limit my speed to 50 MPH in 50 miles. I was 40 miles from home and made it just fine. I can’t get into the dealership until Monday - 4 dealerships within 20 minutes of my house and all have huge ...Jan 10, 2014 · Good afternoon, I sure could use some assistance! I have a 2014 Ram 3500, 16k miles. A CEL came on about a week ago along with the "5mph max speed in 200 miles service DEF system see dealer" message. I took it to the dealer thinking it was covered under warranty.Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope that you can help me ... 8,121 satisfied customers. I have a message on my dash that says Service DEF veh speed.Crystals obstruct the sensor and affect the level of accuracy. As a result, the computer will pick up on this and display the ” Service DEF System See Dealer” warning message. 5. Low Diesel Exhaust Fluid. The fourth and final reason for the “Service DEF System See Dealer” warning is that the fluid level has dropped too low.Hello I have a 2015 Volvo with d13 Volvo engine on my dashboard say service def veh speed limited to 5 mph And I only have this active code p249f-00 Submitted: 8 months ago. Category: Medium and Heavy TrucksUntil your technician replaces the def tank pump/sender (heater 1 assy) Special policy 14652 (came out 7/7/15)and performs a manual heater 1,2,3 command in the glow plug control module you will be limited to 55mph. You can do as many fluid quality and service regens as you want and it will never reset.The Rules of Attraction - Speed dating events are typically held in bars or restaurants, however they have recently spread to college campuses. Find out how speed dating events wor...Mar 22, 2021 · DEF Fault - 50 MPH Max. This morning while driving my 2017 popped up a message on the dash - “DEF Fault ...” - and said that it was going to limit my speed to 50 MPH in 50 miles. I was 40 miles from home and made it just fine. I can’t get into the dealership until Monday - 4 dealerships within 20 minutes of my house and all have huge ...If it is a hard failure then nothing, including the dealers level scan tool, can reset the code/limp mode until the problem is corrected. After it’s ‘cleared’, it will continue to come back and the limp mode will …We love CrashPlan for its inexpensive, unlimited and automated backup service, but many of us have seen terrible upload speeds or high CPU usage when CrashPlan is running. This mig...His dashboard is shining like crazy, saying the truck needs a parked regen (he did it a couple of times, it's still showing); POOR DEF QUALITY to service DEF, speed is limited to 5mph; It has a code I:SA 16 DTC P103C00;#1 · Jan 9, 2022 (Edited) This is my second Silverado 1500 with the 3.0 Duramax. First one was a 2020 and the truck was awesome and never ever had any problems. I traded it at 65,000 miles for a 2021, the 2021 has problems. At random distances I am getting "Service DEF System" and the truck starts slowing itself down.Instacart is speeding up grocery delivery. The company announced today it’s debuting a faster delivery service, “Priority Delivery,” in select markets across the U.S. and Canada, w...the DEF tank. • Low DEF levels will trigger a decrease in engine performance. DEF level is EMPTY and IGNORED Vehicle speed limited to 5 mph / engine derated Flashing DEF level is EMPTY Vehicle speed limited to 55 mph / engine derated DEF level is very low Solid DIESEL EXHAUST FLUID (DEF) INDICATOR LAMPS Low DEF warning light Light bar shows ...The screen popped up saying "Speed Limited within 200 miles Service Def See Dealer" Of course the drive back is 270 miles, and when I called the dealership this morning they said they can't get me in till Wednesday. ... Oh the service manager told me that Fiat Chrysler will reimburse me, all I had to do is call and tell them that I had a trip ...Good morning My 2018 Volvo d13 Had some fault codes took truck to dealer and they fixed software updates And they found fault DEF heater line. Due to lack of parts nationwide this specific part is not available to change at this moment. We are trying to take the truck back to address but Now we have 5mph DEF derate. DEF was opened and …2019 Freightliner Cascadia 570,000 miles I have derate %25 and speed limited at 55 mph. Check engine light is ON, DEF light is blinking I got codes shown on picture. ... I have a message on my dash that says Service DEF veh speed. I have a message on my dash that says Service DEF veh speed limited to 5mph ...Mar 19, 2021. #12. H3LZSN1P3R said: I just got this wonderful message on my way home im gonna try pulling the battery cables and discharging the capacitors ( touching the pos and neg together) we shall see i know about a weekago i got a CEL for DEF module unable to communicate but i cleared them and it didnt reappear.Mar 16, 2017 · 89 km/h (55 mph) Max Speed on Restart. The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously. Vehicle speed is limited to 89 km/h (55 mph). Warning Level 4.Dec 28, 2016 · The SCR performance low came on, started beeping & said service SCR system. Speed limit 5 mph. DEF tank is over between 1/4 & 1/2 full. Suggestions as I'm, on the road?? Thanks. Mechanic's Assistant: What is the complete model and serial number of your machine? CHU(###) ###-####Mack - Serial : 1M1AW07Y7DM024860Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope that you can help me ... 8,121 satisfied customers. I have a message on my dash that says Service DEF veh speed.2017 Volvo d13. Changed def inj. Module dozer had. Filter cleaned only one temp sensor reads good others low temp. Fuel at only 9percent sets p249f00 and went into derate. Soot is at 11 percent can you please get me going in right direction to get it out of derate. Only have a snap on scanner to work with.I have a 2012 Volvo 780 with a d13 and a 10 speed manual transmission. My DEF fluid sensor is showing empty and it put me in derate 5mph Max mode. I have disconnected the speed sensor from transmission to get around derate untill I can get to dealership 100 Miles away. It seems my rpms are limited to about 1500 is this normal?2013 RAM 5500 Service DEF system see dealer. 200 miles until speed limited to 5mph 2880 Views 24 Replies 5 Participants Last post by Jimmy N. , Dec 26, 2020 Jump to Latest Rolltide21 Discussion starter · Dec 24, 2020If the vehicle speed has been limited and DEF has been added, it may take up to 30 seconds after engine start with the vehicle stopped for the EXHAUST FLUID EMPTY message to clear. If the vehicle is driven prior to the DIC message clearing, the vehicle speed will still be limited. If the DIC message clears while driving, the vehicle must be ...When the DEF dosing valve duty cycle increases above allowed threshold and the DEF pump control value decreases below expected threshold, the ACM stops DEF dosing and reports a fault. The fault might be indication of electrical failure or blockage in DEF dosing valve or DEF supply line from the DEF tank. Clogged or damaged component.Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope ... I have a message on my dash that says Service DEF veh speed limited to 5mph ...Jul 13, 2021 · 2019 GMC 2500 6.6 / 55,000 Miles. Was on a road trip last night and got a DIC warning that I had 175 miles until I was limited to 65 mph. Stopped and put in 2.5 gallons of DEF. After driving another 75 miles or so and trying several on/off with the ignition it didn't reset, so I topped it off with another 2 gallons.Yesterday I filled the def tank with eight gallons of def. This morning the def light is flashing along with the check engine and stop light on this 2015 freightliner. The def gauge says full. Company road service thinks I am stupid and put diesel in the def tank but at least is sending out a TA service truck to come see what is wrong with me.None 8km/h (5mph) Road Speed Limit (RSL) Note: Vehicle has to be stationary before 8 km/h (5 mph) RSL becomes active. Exit conditions for DEF Quality “8 km/h (5 mph) Road Speed Limit” (RSL) Inducement First Restart: Return to 25% torque reduction until proper DEF quality evaluation. If poor DEF quality is detected during theHow To Fix Scr Production Low Veh Limited To 5mph & ATS Engine Reducer - Trucks - Nairaland. Nairaland Forum / Nairaland / General / Autos / How To Fix Scr Performance Down Veh Limitation To 5mph & ATS Type Derate (762 Views) . Toks 3540 Toyota RAV0 Limitation To Sale / Extremely Clean And Sound Firstbody Registered 3047 Lexus …Jun 9, 2015 · Until your technician replaces the def tank pump/sender (heater 1 assy) Special policy 14652 (came out 7/7/15)and performs a manual heater 1,2,3 command in the glow plug control module you will be limited to 55mph. You can do as many fluid quality and service regens as you want and it will never reset.2013 RAM 5500 Service DEF system see dealer. 200 miles until speed limited to 5mph 2880 Views 24 Replies 5 Participants Last post by Jimmy N. , Dec 26, 2020 Jump to Latest Rolltide21 Discussion starter · Dec 24, 2020I have a 2013 Volvo with a D13 dash says service Def vehicle sweated to 5 miles an hour. No fault codes. Changed def pump, def tank harness, level sending unit, def, ran regen twice, replaced dash, reprogrammed ACM, Vehicle ECU, Engine ECU, and everything you can program still shows fault in dash and derated to 5 miles an hour I work for a fleet shop have no idea where to go from here. Parked regen was not working. I kept driving to get to TA shop. On the way def gage went from full to empty even i
The shop did scr crital.... and forced regen so level went down but i got stuck with "service def veh speed 5 mph " so while doing regen the temps were going up very fast 1050 deg F and then drop and up and down. So the problem were injectors and cups. Then i cleaned the DPF filter, change 7th injector change def filter drain anf fill up def ...In today’s fast-paced world, accurate navigation is crucial for a seamless driving experience. Whether you’re commuting to work or embarking on a road trip, having access to reliab...Feb 12, 2020 · The DIC displays the following messages: •Exhaust Fluid Quality Poor. •See Owner’s Manual Now. •Speed Limited to 89 km/h (55 mph) The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes ...Truck in 5mph derate. Had SPN-5246-O, SPN-4094-14. Tested everything I could with PTT, EGR, turbo, doser, etc. Use scope to inspect SCR catalyst, checked/tested/changed DEF fluid, Cleared codes. 4094-14 would not clear, did multiple regens including sublimation regen, code would not clear. I am not sure on Mack regen …Are you tired of slow internet speeds and limited options for cable TV providers? If so, you might be interested in exploring the services offered by Xfinity. Xfinity is a popular ...5mph max speed service def system. Jump to Latest Follow May's Cummins of the Month is now open for entries! 21 - 40 of 79 Posts. 1 2 of 4 Go to page. Go. 4. goingcamping2 · Registered. Joined Sep 14, 2017 · 292 Posts #21 · Apr 21, 2019 ... 2023 Ram Limited Mega CabUntil your technician replaces the def tank pump/sender (heater 1 assy) Special policy 14652 (came out 7/7/15)and performs a manual heater 1,2,3 command in the glow plug control module you will be limited to 55mph. You can do as many fluid quality and service regens as you want and it will never reset.Beware some trucks, even if disconnected, will not go over 5 MPH – it is programmed even if the speed sensor is disconnected, so this method may not work all the time. How to fix this 5 MPH derate? You need to see …Sep 4, 2020 · There is probably a problem with the DEF tank level sensor and you will need to get the truck to the dealer so they can connect the WiTech scan tool to the truck and run a few tests. But here's the thing, you will be limited to the 5 mph restriction after 174 miles after you turn off the truck. So if you need to go farther than 174 miles, DO ...When the DEF dosing valve duty cycle increases above allowed threshold and the DEF pump control value decreases below expected threshold, the ACM stops DEF dosing and reports a fault. The fault might be indication of electrical failure or blockage in DEF dosing valve or DEF supply line from the DEF tank. Clogged or damaged component.The ACM and Engine Control Module (ECM) are in direct communication to make sure the system is operational. This also regulates your DPF system and all the sensors associated with that system. The dreaded fault code that causes the 5 MPH derate! This fault is related to the “SCR Inducement” which is what regulates your truck to this derate.Truck Camper Adventure Switches to BlueDEF Platinum. November 13, 2020. Unfortunately, it happened. Our Ram 3500 Cummins 6.7L truck went into the dreaded “limp mode” on a recent trip here in Arizona. The alarm on the dashboard read, “5 mph Max Speed in 100 mi, Service DEF System, See Dealer.”. If this has never happened to you, …29 Nov 2022 ... Derate 5mph on any Volvo Semi Truck remove speed sensor right ✓ DD13, DD15. ... Service def veh speed limited to 5 mph. Jj truck service / Jose ...Mar 19, 2013 · Re: Speed Limited to 90 MPH -- HELP The active struts and shocks, as well as the wheel speed sensors, are all part of the vehicle stability system and sensor inputs (a tiny part). If you fooled with jacking the car up, moving the strut/shock and/or pushing/pulling on the various wire harnesses you may have (temporarily) re-connected a sensor.1,842 Posts. #34 · Oct 10, 2016. You can get a code reader that will delete the codes for less than $100.00 You might also try another dealer or an auto parts store. All they do is attach their hand held computer and delete the code. No way that's worth $150.00 And I'm still not convinced you had a bad def issue.Here's a quick Short to get you out of a jam. Chances is that your DEF Injector is caked with Urea and needs cleaned before replacing or checking the pump. E...I have a 2012 Volvo 780 with a d13 and a 10 speed manual transmission. My DEF fluid sensor is showing empty and it put me in derate 5mph Max mode. I have disconnected the speed sensor from transmission to get around derate untill I can get to dealership 100 Miles away. It seems my rpms are limited to about 1500 is this normal?I have a 2012 Volvo 780 with a d13 and a 10 speed manual transmission. My DEF fluid sensor is showing empty and it put me in derate 5mph Max mode. I have disconnected the speed sensor from transmission to get around derate untill I can get to dealership 100 Miles away. It seems my rpms are limited to about 1500 is this normal?If the DEF low warnings are ignored and the DEF tank becomes empty, the DIC will display messages that describe the action needed and distance until vehicle speed is limited. For the DEF warning light symbol. This came out of my diesel supplement manual for my 3.0 diesel.DEF pump went out and cost me $1100.00. The guard was also faulty and showed 3/4 of a tank while the dealership said there was only about 6 ounces in the system. Truck has 60k miles on it. I was told to expect the service light again between 67k and 75k miles. Like.Suddenlink Internet Services is a leading provider of high-speed internet in various regions across the United States. With their wide range of speeds and packages, they cater to t...DEF pump went out and cost me $1100.00. The guard was also faulty and showed 3/4 of a tank while the dealership said there was only about 6 ounces in the system. Truck has 60k miles on it. I was told to expect the service light again between 67k and 75k miles. Like.None 8km/h (5mph) Road Speed Limit (RSL) Note: Vehicle has to be stationary before 8 km/h (5 mph) RSL becomes active. Exit conditions for DEF Quality “8 km/h (5 mph) Road Speed Limit” (RSL) Inducement First Restart: Return to 25% torque reduction until proper DEF quality evaluation. If poor DEF quality is detected during theWARNING!!: ⚠️⚠️⚠️Always use the proper tools and safety equipment to perform this job. Failure to perform the job correctly can result in personal injury or ...Until your technician replaces the def tank pump/sender (heater 1 assy) Special policy 14652 (came out 7/7/15)and performs a manual heater 1,2,3 command in the glow plug control module you will be limited to 55mph. You can do as many fluid quality and service regens as you want and it will never reset.In today’s fast-paced world, accurate navigation is crucial for a seamless driving experience. Whether you’re commuting to work or embarking on a road trip, having access to reliab...2013 RAM 5500 Service DEF system see dealer. 200 miles until speed limited to 5mph. Jump to Latest Follow ... The DEF could very well be frozen into a solid chunk, depending on where in CO it sat. We had that happen on a '17 that sat, but that was for at least a month.A defective SCR operation can cause the dreaded "service def vehicle speed limited to 5 mph." If this happens you need to clear the SCR derate with a dealer level tool, or with OTR Diagnostics. The reset will remove the derate message off the instrument cluster and will allow you to drive past 5 mph.Service DEF vehicle speed limited to 5 mph. Removing the speed sensor does not resolve the issue. Volvo D13 SCR system ... I have a message on my dash that says Service DEF veh speed limited to 5mph ...2016 Volvo VNL670, D13 “Service DEF, speed limited to 5 mph” message ... 8,454 satisfied customers. I have a message on my dash that says Service DEF veh speed.(05-27-2016, 08:32 PM) trs100 Wrote: (05-27-2016, 08:28 PM) taraba Wrote: You can try to disconnect Speed Sensor, but I wouldnt drive it few hundred miles, If engine is derated it means something is not working right, and you might end up spending a lot more on repairs. Thanks for the advise. Problem is the SCR system just have some messages for low …still derated and no lights information screen on dash says service def vehicle speed limited to 5 mph Technician: roybelding , Shop Foreman Freightliner trucks replied 7 years ago does not make any sense. if de rated, it should set a code.On my Dodge Cummins, a warning appears on the dashboard, stating, ‘5 MPH Max Speed in 49 mi Service DEF System See Dealer.’ This warning message indicates the issue with the Diesel Exhaust Fluid (DEF) system. Because of this, the vehicle has entered a reduced-speed or limp mode. The maximum speed is limited to 5 mph.Have had the DEF warning about “174 mi until power reduced to 65 mph” pop up three different times but no engine light and DEF is showing 35% to 95% full). Had the dealer look into it when it was in for other problems (bad trans, then crankshaft position sensor) but received no info from dealers (2 different dealers).Has just picked up a 2020 Silverado from the auction with DEF system issues. Parked regen was not working. I kept driving to get to TA shop. On the way def gage went from full to