--- title: AdBlue in a Diesel Tank Church End: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/church-end-wiltshire/ location: Church End county: Wiltshire latitude: 51.506910 longitude: -1.966600 service: AdBlue in a Diesel Tank updated: 2026-10-11 --- # Why It Happens and How to Prevent It: AdBlue in a Diesel Tank in Church End AdBlue already in the diesel tank? Then put this page aside for now, leave your ignition and motor off, then call 0333 366 0103. Caught before your engine runs, it's generally a drain and a thorough flush, done where the car is in Church End. Not happened yet? Further down, the page explains the why it occurs and the ways to avoid it for good. ## AdBlue in a diesel vehicle: two tanks, two fillers Many newer diesels on the roads about Church End and New Zealand carry two liquids, not one. Diesel goes to the motor. Stored in a tank of its own, AdBlue is fed into your exhaust stream to clean it. Separate tanks, separate fillers. Plenty of vehicles share a single flap for the two, whereas others move the AdBlue filler to the boot or under the bonnet. At the pump, the diesel side is topped up constantly. Someone who has to stop and work out where it goes usually tops up the AdBlue side, from a bottle, and much less regularly. The error lives in that gap. ## How does AdBlue in your diesel tank happen around Church End? Three things tend to come together, and carelessness is rarely one of them. Haste follows from the warning. Your car tells you as AdBlue runs low, and a dry tank puts it into limp mode — so the top-up happens in a rush, before work on a driveway off Calne Road, or on the way home in the car park outside The Mallard. Then, your hand goes for the cap it knew on the old car — since a hire car, a new car or a company car puts the fillers somewhere your last one did not. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the pour after it has started. The same few seconds settle it, in the middle of Church End or out in Lyneham. ## Telling the AdBlue filler from your diesel filler Before you tip anything, whether on a drive in Littlecott or a forecourt around Church End, check these. They take a few seconds. - Where it sits misleads; the cap does not. AdBlue caps are often blue or carry the word "AdBlue" — diesel caps normally do not. - Plenty of cars give AdBlue the smaller filler of the two. - The flap. Look inside the fuel flap for a label. Many vehicles say there which fuel goes where. - Cannot find it beside the diesel inlet? In that case check below the bonnet or in your boot — the owner's manual says which. - The previous driver will know. Ask when you collect a rental or fleet car — at Chippenham's car park, say — not when the light appears. ## Keeping AdBlue out of the diesel tank when you top up The day the light comes on, wherever around Wiltshire, follow this routine. - Turn off after you park — flat ground, motor stopped, and not rushed by Muscovey Close on the verge. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it works. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — then leave the car on. - Tip slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Shut the cap, and check once more — confirm the diesel filler remained shut the whole time. Only then, start the car. Spot at step two or three that it has already gone into your diesel side? So stop just there. Never go on to step five. ## Put AdBlue in your diesel tank in Church End already? Don't start your engine: that is how the short order of things starts. Keep your ignition off too, since on plenty of diesels it by itself starts the fuel pump. Don't top up with diesel to thin it: AdBlue does not mix with diesel, it sinks to the bottom of the tank, where your fuel is sucked from. Ask the attendants to help roll your car away from the petrol pump if you are on a forecourt — the Esso, the Tesco or somewhere else. If you're on your own drive around Church End, leave it where it sits. If your motor has already run, stop as soon as it is safe and switch off. The next exit is where to come off when you are on the M4, under 3 miles from Church End. Tell us about how far it went: a run towards Bath, under 25 miles away, is a bigger job than a short hop across Church End. ## Our arrival in Church End, and what happens next Our technicians come to your car wherever it has stopped, whether that is outside Lyneham Primary School, close to St. Michael and All Angels or on your own drive. Those replies settle this work and the price, and so we ask what went in, about how much, and if it's run. The price is given over the phone, before any van leaves. Next: draining, then a thorough flush of the entire system. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own. Your filter is flushed, or replaced where it needs to be; fresh diesel goes in; and your car is tested. We do not leave until it has been started and is running properly. With pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs in which the engine hasn't run need roughly half an hour once our engineers arrive. Your insurer will ask for an engineer's report and the VAT invoice, and you get both once the job is done. Payment is on the day, with no deposit. While we travel, take a look at your insurance documents; plenty carry cover for misfuelling. ## About Church End Church End is a suburban area in Wiltshire, situated inland at an elevation of around 130 metres, and is located approximately 79 miles west of London. Church End is characterized by its predominantly semi-detached housing stock, and is close to the nearby places of Lyneham, Preston, and Tockenham. Church End sits within the wider commuter belt of the city of Bath, which is about 19 miles to the west. ## Church End and Wiltshire: AdBlue drains across the area Throughout SN postcodes, the teams that cover Church End — a residential suburb — work the nearby locations too, Tockenham and Preston included. Quickest of all: quote a SN15 4 postcode to the van. There's no need to move the vehicle. Our engineers drain it where it is — a side street close to Lyneham Library, a lay-by on the way to Lyneham Memorial Garden, a drive. Awkward to pin down, like the back of Woolwich Bell Tower? By a county line? Checking beats assuming, and so ring. ## Church End motorists: the short version Tip no AdBlue till you've read the cap. AdBlue in your diesel tank after all? Keep it off then phone 0333 366 0103; Petrol in Diesel empties it on the spot, throughout Wiltshire.