P20EE fault code: what 11 owners reported

TL* THE CONTACT OWNS A 2017 RAM 1500. WHILE DRIVING AT AN UNKNOWN SPEED, THE CHECK ENGINE INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO FOUND FAILURE CODES: P0402 AND P20EE. THE FAILURE RECURRED AND THE CONTACT WAS INFORMED TO CALL THE DEALER. THE CONTACT WAS UNAWARE OF NHTSA CAMPAIGN NUMBER: 19V757000 (ENGINE AND ENGINE COOLING). THE VEHICLE WAS TAKEN TO WILSON MOTORS (541-286-7610, LOCATED AT 425 N W BUCHANAN, CORVALLIS, OR 97330-6253), BUT THE PARTS WERE NOT AVAILABLE FOR THE REPAIR. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND WAS NOT ABLE TO CONFIRM WHEN THE PARTS WERE TO BECOME AVAILABLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS…

A dealer "fixed" the P20EE code on this date, then the code came back a week later. Same dealer said they don't have qualified diesel technician, took vehicle to a 2nd dealer 9/22/2025, unable to determine cause of code. On 6/18/2026 same P20EE code came on again, took to dealer, dealer able to perform repairs on 7/30/2026 after ordering the correct parts. No on 9/23/2026 P20EE code is back.

Warranty will be over in 60 days; the Catalyst Coverter is going back, the Audi dealer and Audi Corporate are delaying the fixture do to some mis communication between dealer and corporate. The problem has to do with DEF gases not being cleanup. The error code is P20EE00 and the engine light is on. The part is under warranty and Audi Corporate is delaying the fixt because the do not wish to pay for the cost. They have had my vehicle for a full week and no decision when to replace the part. I strongly believe they want the warranty to expire so the customer has to pay for cost of the catalyst. The dealer has verified that part is under warranty but corporate does NOT response to the dealer.0

The component/system that failed or malfunctioned is the SCR (Selective Catalytic Reduction) NOx Catalyst Efficiency system, triggering DTC P20EE – SCR NOx Catalyst Efficiency Below Threshold (Bank 1). This issue began immediately after Ford Recall 24S78 (PCM software update) was performed on April 29, 2026 at Ferman Ford of Countryside. The truck had zero emissions or check-engine issues prior to the recall flash and was perfectly maintained to Ford standards with Howes diesel treatment every tank. The problem has been reproduced and confirmed multiple times by the dealer: After the May 4 PCM reprogram per TSB 21-2248 After replacement of both NOx sensors on May 5 (code returned in under 17…

IT APPEAR DEF SYSTEM AND CAT CONVERTER NOT PROPERLY DESIGNED VEHICLE IN 3 TIMES FOR SAME FAILURE CODE P20EE ALL ISSUES RELATE TO EMISSIONS AND SENSORS THERE'S A PUMP AND A SCREEN OR TWO BUT CLOGS CRYSTALLIZATION ARE WHAT CASES VEHICLE TO INITIATE A COUNTDOWN TIMER TIL ENGINE STOPS MY VEHICLE IN FOR REPAIR NOW THIS IS ISSUE FOR DIESEL VEHICLES ONLY I AM ALSO ON JEEP WEBSITE OR MORE SO FORUMS EVERYONE SEEMS TO HAVE THIS PROBLEM. *TR

Components failed, Nitrogen Oxide Sensor, codes P2201 NOx sensor "Circut" bank 1 P20EE NOx catalytic Reduction P205B Reductant tank temperature " Circut" implausible signal

2016 ECODIESEL HAS A MALFUNCTIONING EGR COOLER AND LEAKS COOLANT INTO THE EXHAUST SYSTEM THUS CAUSING SEVERAL ISSUES: CEL CODE P20EE, LOSS OF COOLANT AT A RATE OF 2 GALLONS PER WEEK, DPF ISSUE & DEF INJECTOR ISSUES. RAM CUSTOMER CARE SAYS I SHOULD JUST DRIVE IT AND "MONITOR" THE COOLANT LEVEL AND I GET TO PAY FOR THAT AT 20.00 A GALLON AT TWO GALLONS PER WEEK UNTIL JANUARY 2020 OR LATER. WITH THE POSSIBILITY THAT THE ENGINE WILL GET ON FIRE.. THERE IS A FIX, SO RAM SAYS BUT NO PARTS AND WE ARE TO DRIVE A VEHICLE WITH MAJOR ISSUE FOR MONTHS? APPEARS RAM DOESN'T CARE ABOUT CUSTOMER SAFETY ONLY THEIR MONEY. GREEDY, GREEDY...

My IntelliBeam function stops working sometimes, I can still use the lights as normal but the IntelliBeam function stops every so often and starts working after about 2 to 10 mins. Lane departure warning stops every so often and will start working after 1 to 10 mins, I have noticed that when it stops working at night time then the IntelliBeam function stops working also. When I press the on/off button for lane departure then it will say that lane departure is unavailable right now. I have been getting a p20ee code showing something is wrong with SCR nox sensor 2. Scan tool reveals that the sensor works normal and then stops. Once I clear the code then it works good for a few days.

THE RAM ECODIESEL 3.0L TRUCK HAD A CHECK ENGINE LIGHT THAT CAME ON WHILE DRIVING, SHOWING A P20EE ERROR, REQUIRING THE REPLACEMENT OF THE DIESEL EXHAUST SELECTIVE CATALYTIC REDUCTION (SCR) AT UNDER 27,000MI THE DEALERSHIP I DEALT WITH WAS GREAT IN GETTING IT FIXED, BUT I AM CONCERNED THE NEW EXHAUST SCR THAT WAS INSTALLED WON'T LAST THE LIFE OF THE VEHICLE IF THE FIRST ONE ONLY LASTED A LITTLE OVER 26,000MI UNLESS THEY MADE A CHANGE AND/OR UPDATED THE PART THAT WAS INSTALLED ON MY TRUCK. I'M HOPING THE REPLACED PART WAS UPDATED BY RAM AND THE CAUSE OF THIS ERROR CORRECTED, BUT I HAVE NOT BEEN GIVEN THIS INFORMATION AT THIS TIME.

The contact owns a 2016 Ram 1500. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. No warning lights were illuminated. While attempting to start the vehicle, the vehicle failed to start. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. In addition, the contact connected a portable diagnostic machine to the vehicle and received two fault codes. The codes were P20EE and P016P. The contact received notification of NHTSA Campaign Number: 22V406000 (Fuel System, Diesel). The contact stated that the VIN was included in the recall. The manufacturer was not made aware of the failure…