LandCruiser AdBlue Error

Greetings! Your predicament echoes a challenge I faced with my previous vehicle, a 2018 Mercedes-Benz GLE. While the marque and model diverge considerably, the underlying principle of Selective Catalytic Reduction (SCR) remains consistent. The symptoms you describe – the erroneous message on the instrument panel, the stored diagnostic trouble code, and the subsequent inability to initiate the combustion process – are indicative of a potential malfunction within the AdBlue delivery system. Have you inspected the SCR catalyst system for any visible blockages or leaks? What is the indicated tank capacity according to the vehicle's computer? Furthermore, are you utilizing the correct Diesel Exhaust Fluid (DEF) fluid?

Thanks for the detailed response! I haven't checked for blockages or leaks yet, but I will definitely add that to my list. As for the tank capacity, the computer is reading empty even after I filled it. And yes, I am using the correct DEF fluid. Could the issue be more than just a blockage, like a faulty sensor or pump?

Given the additional information you have furnished, it is becoming increasingly probable that the root cause of the anomaly transcends a mere blockage within the AdBlue delivery conduit. The persistent indication of an empty reservoir, coupled with the utilization of the appropriate reagent, intimates the possibility of a defective sensor or, conceivably, a malfunctioning pump integral to the SCR apparatus. In light of the complexities inherent in diagnosing and rectifying such intricate automotive systems, I would strongly advise seeking counsel from a qualified automotive technician. It is my considered opinion that their expertise will prove invaluable in accurately pinpointing the source of the malfunction and implementing the requisite corrective measures. It's like a doctor recommending an MRI when they can't diagnose you with a simple stethoscope exam.

Thanks a lot for your help! I took it to a workshop, and you were spot on. Turns out the AdBlue output from the tank to the dosing unit was indeed defective. They replaced it, and now everything is working fine. The repair cost was around 250€ Appreciate the insights!