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How those engines work is it first uses the sensor in the DEF tank for the fluid level. It doesn't use a quality sensor in the tank. The level has to show there was a fill of the tank if it is under 1/4 full. If it is lower, it needs to be filled to above that much. Then it uses the NOx sensors before and after the Catalyst.Problem is DEF gauge reading empty blinking red light. Have replaced tank head. have both check engine and stop engine lights ... I have a 2016 freightliner HDJE6489 the def tank is full but the yellow light is flashing that it is empty changed fluid ,sending unit, had filters cleaned reset everything performed aftertreatment sc ...Jan 20, 2013 · Catch is that I had 5-8 of a tank. My dash computer switched over to saying Low DEF and my check engine lamp was on. I pulled into the Pilot in Rayville, LA and bought a jug of DEF. Put it in my tank and gave it a few minutes to settle. When I restarted my truck the gauge showed I now had 6/8 of a tank but now the red light was flashing at me. Nich1019. Diesel Technician. Vocational, Technical or Tra... 145 satisfied customers. 2015 kenworth t680 def gauge reads empty but tank is full, 2015 kenworth t680 def gauge reads empty but tank is full, no check engine lights, truck will not start,replaced def tank level. Could it be the def … read more.The DEF tank will require filling a minimum of approximately every second diesel refuel depending on the DEF tank capacity. The Saf-T-Liner C2 School Bus has an 11.5-gallon tank capacity. DEF consumption is approximately 2% of fuel consumption, dependent on vehicle operation.2016 npr 5.2 l. red exhaust light on, def light on , engine reduced power light on. def fluids is full. pm level is 0. no codes at all.what else would keep lights on. Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about? Big red exhaust light in the MID, the def symbol and the engine reduced power lightDd15 yellow def low level light is flashing def full. Check engine light is on. Has fault codes 5246 15 and 16. There is no derate. Happen the other day then light and all codes went away. … read moreDef Tank Full But Light Blinking On 2014. Def Tank Full But Light Blinking. Engine power will continue to be reduced automatically. Of course this also …The def light is flashing, the def tank is full, the truck goes into derate when you start to drive it. The batteries - Answered by a verified Technician We use cookies to give you the best possible experience on our website.DEF module (the computer for the DEF system- in the front of the truck kind of behind the grill) DEF Tank- has a level sensor inside, temp sensor, and a stainless steel loop for coolant to pass through and warm the fluid in cold conditions DEF Pump- behind the tank, has a filter in the bottom of it.Spartan now has a phone app that will give the meaning of the fault code numbers. Push your odometer arrow until fault code comes up, the push the bottom arrow to read the code (s). A red flashing DEF I am going to guess is one of the DEF sensors. Hopefully it is false code and goes away, but red it not good.Headed on a road trip and for the last few 100 miles I have been repeatedly getting the below warning. “DEF Fault Speed Likited to 50 MPH in 50 miles”. Makes complete since right if your DEF tank is low. HOWEVER…. Look and my Def tank gauge, just over 50% full. Nor did I get the typical “500 mile range left on Def tank” notification.Restart coach and I have 2 green bars. Good to see that (but the two engine lights are still on). I keep driving and the 2 green bars change to 1 red flashing again. Pull over again, add another 2.5 gallons of DEF. At this point I can visually see the tank is nearly full. Start the coach, it shows 3 green bars.To reset your engine system properly, you’d have to disconnect the negative battery cable and let your engine drain away all its power by waiting for about 30 minutes. This will force the computer to reset on its own. Later on, you need to use a code reader, pour in enough DEF, and take the vehicle to a repair shop .I have a 2015 Kenworth T680 with a Paccar engine. My def tank is on full. My def light is blinking, a second check engine light is on, and a warning message saying poor def quality. Mechanic's Assistant: How long has the check engine light been on? When did you last change the oil? It came on when the def light started blinking about 10 hrs agoAnd when the DEF level has gone far too low, it will prevent the engine from starting unless you have added the right amount of fluid. Driving With A DEF Light Turned On. Before the tank runs empty, there is an alert on the dashboard that comes on, which is the DEF light. But if the DEF goes below 2.5 percent, the light will turn solid amber.GMC 2011 3500HD Duramax DEF light on followed by engine check light, Fault codes P2047, P208A, P204C, P205D, U010E. all can be cleared and return at start up. Have removed DEF tank, cleaned system with water, checked wire harness continuity OK, New tank heater, New DEF injector to exhaust, New DEF fluid. Same Fault codes at start up. … read moreLow def light flashing on paccar T680 kenworth 2013, we tested harness, harness checks good, colder temp will trigger low def light flashing. we replaced the sensor, replaced dozer module, updated ecm, when the truck warms up light goes out and problem goes away. changed tank sending unit, works for 2 days then low def flashing …Professionals are not employees of the site but users of the site and help on here as time allows depending on their daily schedule. If there is no check engine light but you are getting a warning light, it is still an indication that there is a problem with the DEF system. If it is full, I recommend having this plugged in to the appropriate ...

Stop Engine Lamp with Flashing DEF Lamp and Solid Check Engine Lamp Indicates that DEF level is critically low and fuel tank has been refilled without refilling DEF tank, or engine has idled for an hour or been shut down. Vehicle will be limited to a speed of 5 mph. Refill DEF tank with correct type of DEF. Refill DEF tank with correct type of DEFRestart coach and I have 2 green bars. Good to see that (but the two engine lights are still on). I keep driving and the 2 green bars change to 1 red flashing again. Pull over again, add another 2.5 gallons of DEF. At this point I can visually see the tank is nearly full. Start the coach, it shows 3 green bars.However, the DEF gauge can show you that the DEF tank is empty when full due to various faults in your vehicle. ... The alert light turns from a flashing light to a solid amber light when the fluid level drops to 2.5 percent. If you ignore the warning to the point where the DEF tank dries out completely, the light turns from solid amber to ...2011 DEF issues. This truck is a 2011 with 24K miles as it is one of my vehicles used only to move the 5th wheel to and from our property or hunting season for the boat and gear. Friday After about 2 hours of driving the "service DEF" light came on at the same time as the "Service Engine" light.

DEF is detected in the tank. Flashing • The parked regeneration may take up to 40 minutes. • The parked regeneration is complete when the engine returns to idle and the DPF lamp remains off. The HEST light may remain on, but the vehicle can be driven. • A parked regeneration will stop if the key is turned to the OFF position, clutch is ... Cranks but no start def light flashing gauge is at Empty and. Cranks but no start def light flashing gauge is at Empty and I know the tanks is half full of def Paccar MX13 ... serial number is ***** I have code p1517 and p1518 I have davie 4 and the trouble shooting steps I have replaced the def tank put ne ...When you see the DEF light flashing, it is telling you that your DEF tank is critically low. When you see the light flashing, you need to stop what you are…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 2020 freightliner M2-106 with 3 lights on.1 Check engine light. 2 A. Possible cause: 28 nov 2018 ... I let my DEF level drop to 10% and the low DEF light came.