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An AdBlue NOx sensor fault means one of the sensors monitoring nitrogen oxide levels in your exhaust, usually one positioned...

A failed AdBlue dosing test means your vehicle’s own self check, the one that confirms AdBlue is actually being injected...

“Communication fault” is one of those messages that sounds worse than it usually is, and also more confusing. Your car...

Usually, yes. We say that a lot in this workshop, mostly because the pump gets blamed first almost every single...

An AdBlue heater fault means the car has found a problem with the parts that stop AdBlue from freezing. AdBlue...

Depends entirely on what’s actually gone wrong with it, which isn’t the answer most people want when they’re staring at...

Depends what got in there, and how long it sat before anyone noticed. That’s genuinely the whole answer, annoying as...

Sometimes. Sometimes not. Annoying answer, we know, but it’s the true one, and it’s the question we get asked almost...

Pressure climbs. Then it falls back before the dosing module can actually use it. Then it climbs again. That cycle,...