christopherlang4

Tucson AdBlue System Issue

My 2016 Hyundai Tucson diesel (150653 km) shows an empty AdBlue tank despite a recent fill. Error message on the speedometer, stored error code, and the engine won't start. Diagnostics point to a problem with AdBlue output from the tank to the dosing unit. Anyone seen this?

A 2016 Hyundai Tucson diesel displayed an empty AdBlue tank warning and wouldn't start despite a recent fill. Diagnostics indicated an issue with AdBlue output from the tank to the dosing unit. A similar case suggested checking for blockages or leaks in the lines, but the problem was identified as a faulty pump restricting flow. The solution involved replacing the defective AdBlue pump at a workshop.

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4 comment(s)

I also own a Tucson diesel. I had similar symptoms – dashboard alert, engine won't start, all related to the AdBlue system. Check the lines to the injection system for blockages or leaks.

Thanks for the quick reply. Did your diagnosis specifically isolate the problem to the AdBlue output from the tank, or was it a more general issue in the DEF fluid system?

The issue was a faulty pump restricting AdBlue flow. Considering your symptoms and the potential repair cost (around 250€), I'd suggest a workshop visit for a proper diagnosis and repair.

Thanks for the advice. I took it to a workshop, and they confirmed a defective AdBlue pump, just like we discussed. Replacement is happening now.

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HYUNDAI

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TUCSON