The top-up that doesn't clear the AdBlue light
Most AdBlue top-ups happen at home, and around Rosehill that often means a jug of fluid and a car parked tight against the kerb on one of the narrow St Helier estate streets. Done carefully it's fine. The trouble starts when the warning doesn't go away afterwards, or the gauge still reads empty with a full tank. At that point the fault is usually in the tank itself rather than the amount of fluid in it.
The level sender and the quality sensor both sit inside the AdBlue tank, often as part of a combined module with the pump and heater. A sender that has failed keeps telling the ECU the tank is empty, and the car may begin the countdown whatever you've poured in. A quality sensor can object to fluid that's contaminated, diluted or simply old. Spilled fluid around the filler neck also dries into white crystals, which look alarming but usually wipe away with warm water.
Some cars genuinely need a short drive or a few ignition cycles to register a refill, so we start by checking what the ECU actually sees: the reported level, the quality reading and any stored codes. We test the fluid, then the sender and sensor circuits. Once we know which part is responsible, you get a written quote with the options for your model, as some tanks are only sold as a complete unit.
From the Rose Hill roundabout it's about 2.5 miles to us, down Wrythe Lane past St Helier Hospital and on via Nightingale Road and Hackbridge Road. If you live nearer St Helier station or Sutton Common station, you'll join the same route. Rose Hill and Angel Hill get congested with school and park traffic, so allow a little longer at those times. Repairs carry our 3-month workmanship warranty.