--- title: Explained: AdBlue in a Diesel Tank Lower Sheering canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/lower-sheering-essex/ location: Lower Sheering county: Essex latitude: 51.810000 longitude: 0.162250 service: AdBlue in a Diesel Tank updated: 2026-10-27 --- # Preventing AdBlue in a Diesel Tank in Lower Sheering: Why It Occurs If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and the ignition off then call 0333 366 0103. A drain and a thorough flush, carried out right where the vehicle sits in Lower Sheering, is usually what it needs when caught before the motor runs. Nothing happened yet? Below, the rest of the page covers the why it occurs and the how to avoid it for good. ## Why does AdBlue in a diesel motor need its own filler? Many newer diesels in Gaston Green, as well as Lower Sheering, carry on two liquids; your motor takes only your diesel. The exhaust, not your motor, is where AdBlue goes: dosed into the gas to fresh them, from a separate tank. Every tank comes with a filler of its own. Some cars keep the AdBlue filler in your boot or under the bonnet; a lot of others place both together behind one flap. Filling the diesel side at the pump happens constantly. Rarely topped up, AdBlue normally comes out of a bottle, poured by someone who has to stop and think what cap it needs. That gap is where the error lives. ## How AdBlue in the diesel tank takes place in Lower Sheering Carelessness seldom causes it. Instead is three things coming up together. On a drive off The Four Acres before work, or in the car park outside The King William IV heading home: that's where the hurried top-up takes place. Why the rush? As AdBlue gets low the vehicle warns you, and once it is empty, limp mode kicks in. Then the car is new. A hire car, a new motor or a company car puts the fillers where your last one did not, and your hand reaches for the cap it would have used on the old one. Lastly, the bottle fits: diesel filler or AdBlue one, it slides in as readily, and after the tip starts, no part halts it. Sawbridgeworth or the heart of Lower Sheering: it is the same few seconds either way. ## Which filler is for AdBlue, and which for diesel? Whether a Lower Sheering forecourt or a drive out in High Wych, spend a few seconds over these before any is poured in. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". The diesel cap usually is not. Read it instead of going by where it sits. - The size. On many motors the AdBlue filler neck is the smaller of the two. - A label inside your fuel flap often shows which fuel goes where, on plenty of motors. Check for it. - In the boot or under the bonnet: that is where the filler sits if it is not by the diesel cap, and the handbook says which. - Picking up a hire or company car, perhaps at the car park at Sawbridgeworth? Ask whoever drove it last before you set off, rather than once the light goes on. ## How to top up without AdBlue in your diesel tank Wherever around Essex the light comes on, here is a routine for the day. - Not in a rush on the side of Meadow Way, not on a slope, not with your motor running: park then switch off properly. - Daft as it sounds, saying "AdBlue" out loud as you unscrew the cap works — after you've found your filler and read it. - Both under a single flap? Then confirm the cap on the diesel side stays shut before lifting the bottle. - Stop once your tank fills or the bottle runs dry; until then, tip slowly through the own spout. - Close the cap and check again. Make sure the diesel cap was never opened. Only then start your car. Discover during the second or third stage that AdBlue went in the diesel filler? That's where you stop. Never carry on to step five. ## Lower Sheering: already put AdBlue in your diesel tank? What follows is a short order of things, beginning with not starting the engine. Do not switch your ignition on; on plenty of diesels that alone runs the fuel pump. AdBlue does not mix with diesel — it sinks to the bottom of the tank, where your fuel is pulled from — so do not top up with diesel to thin it. Ask the attendants to help push the car clear of the petrol pump if you're on a forecourt — the Shell, the Tesco or anywhere else. On your own drive in Lower Sheering? So the vehicle remains put. If your motor has already run, stop as soon as it is safe then switch off. The next exit means the place to come off when you are on the M11, under a mile from Lower Sheering. About how far did it go? Crossing Lower Sheering is smaller a job than a trip of under 15 miles towards Chelmsford, and so tell us. ## What occurs when we turn up around Lower Sheering Anywhere your car came to rest, be it outside Fawbert and Barnard Infants' School, near Great St Mary's or on your own drive, our van comes to it. Both the work and the quote depend on three replies — which fluid, which quantity, and if it's run — so our technicians ask. Nobody sets off before you've had our price by phone. Then the tank is drained and the fuel system purged thoroughly. More than with petrol, it matters here: crystals form, some metals are attacked, and nothing washes away on its own, however long it is left. After the fuel filter has been cleaned — or replaced, if required — fresh diesel goes in, and then the vehicle is tested. The motor is fired up next and checked to make sure it runs properly, all before our technicians leave. If the motor has not run, the majority of jobs take about half an hour once we are there, using pumps that are fine on a busy forecourt and quiet enough to use outside a house at night. Paying is on the day, not upfront, and you are given the paperwork your insurer wants: an engineer report and a VAT invoice. Many insurance policies include misfuelling cover, and so it is worth checking yours whilst we're on the way. ## About Lower Sheering, briefly Lower Sheering is a suburban area situated on the riverside in Essex, with an elevation of around 52 metres. Lower Sheering lies near the cities of Chelmsford and London, and is close to the nearby places of Sawbridgeworth, Sheering, and Campions. Lower Sheering has a population of approximately 3020 people and is characterized by predominantly semi-detached housing. ## Lower Sheering and Essex: AdBlue drains across the area Sheering and Campions are among the places around Lower Sheering, a residential suburb, that the same teams cover, over CM postcodes. The van gets to you fastest with a postcode starting CM21 9. Moving the vehicle isn't needed. Anywhere it stands — beside Sawbridgeworth Memorial Hall, in a layby heading to Lower Sheering Playing Field, on a drive — that is where it gets emptied. Tricky to pin down, like the back of Sawbridgeworth Library? Close to a border? Checking beats assuming, and so phone. ## Lower Sheering people: the short version Always, the cap; then, the tip. AdBlue in the diesel tank regardless? Keep it off then ring 0333 366 0103; Petrol in Diesel empties it on the spot, across Essex.