--- title: AdBlue in a Diesel Tank Hitchin Square? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/hitchin-square-greater-london/ location: Hitchin Square county: Greater London latitude: 51.532640 longitude: -0.034790 service: AdBlue in a Diesel Tank updated: 2026-10-02 --- # Avoiding AdBlue in a Diesel Tank in Hitchin Square: Why It Happens Pause reading for a moment when the diesel tank already has AdBlue in it: ignition off, engine off, and call 0333 366 0103. A drain and a full flush, carried out right where the vehicle sits in Hitchin Square, is normally all it needs if found before the engine runs. The rest of this page covers why it occurs and how to ensure it does not — useful if you're reading ahead of time. ## Two fillers, two tanks: AdBlue in a diesel motor Plenty of modern diesels on the roads around Hitchin Square and Globe Town carry two liquids, not one. Diesel goes to your engine. Stored in a tank of its own, AdBlue is sprayed into your exhaust stream and cleans it. There's a filler on every tank. Some motors keep the AdBlue filler in your boot or under the bonnet; plenty of others place the two side by side under one flap. The diesel side is filled at the petrol pump all the time. Far less regularly, the AdBlue side is topped up — mostly from a bottle, by someone thinking about where it goes. That gap is where the slip lives. ## How does AdBlue in your diesel tank happen in Hitchin Square? Carelessness rarely causes it. Instead is three things lining up together. Hurry follows from the warning. The car warns you as AdBlue runs low, and an empty tank puts it into limp mode — so the top-up gets done quickly, before work on a drive off Ford Close, or heading home in the car park at Young Prince. The old car's cap is where your hand reaches — yet a rental car, a new vehicle or a company car keeps the fillers somewhere else. That's a second factor: a strange motor. Lastly, the bottle goes in: diesel filler or AdBlue one, it goes in just as readily, and once the pour begins, no part stops it. It's a few seconds, whether out in Bow or bang in the heart of Hitchin Square. ## Which filler is for AdBlue, and which for diesel? Look at these before pouring, on a forecourt in Hitchin Square or a driveway over in Hackney Wick. A few seconds, that's all. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". The diesel cap usually is not. Read it rather than going by where it sits. - On plenty of cars, size gives it away: AdBlue gets the smaller filler neck. - A label inside the fuel flap frequently says which fuel goes where, on many vehicles. Check for it. - Cannot see it next to the diesel inlet? Then look below the bonnet or in the boot — the owner's manual says which. - The person who drove the car last. On a hire or company car picked up from somewhere like the car park outside Hackney Wick, ask before you leave, not when the light comes on. ## Topping up AdBlue without it reaching the diesel tank Anywhere around Greater London the light comes on, this is a routine for that day. - Turn off after you park — flat ground, motor stopped, and not rushed beside Roman Road on the verge. - Daft as it sounds, saying "AdBlue" aloud as you unscrew the cap does the trick — once you have located your filler and read it. - The diesel cap remains on. Where the two share a flap, confirm it's closed before lifting the bottle. - Stop once the tank is topped up or the bottle is empty; until then, pour gently using its own spout. - Close the cap, then look again — confirm the diesel cap remained closed throughout. After that, start the vehicle. Spot at stage two or three that it's already gone into your diesel side? Then stop just there. Never carry on to step five. ## Hitchin Square: already put AdBlue in the diesel tank? Then the order of things is short. Don't start your engine. On plenty of diesels your ignition alone runs the fuel pump, so do not switch the vehicle on. Do not top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of the tank, where your fuel is drawn from. The staff at Shell, Texaco or any forecourt will normally help to push the car away if asked. At home in Hitchin Square? So the vehicle stays put. Stop as soon as it is safe and switch off, if the engine has already run. Leave the M11 — under 5 miles out of Hitchin Square — at the first exit. Roughly how far did it go? Crossing Hitchin Square is smaller work than a trip of under 3 miles towards London, so tell us. ## Our arrival around Hitchin Square, and what takes place next Wherever your car has stopped, be it outside Old Ford Primary - A Paradigm Academy, near 45 Norman Grove or at home, our van travels to it. Both the work and our price depend on three replies — which liquid, which quantity, and whether it has run — so our engineers ask. No one sets off until you've had the quote over the phone. The fuel system is then purged thoroughly, once your tank is cleared. With AdBlue that matters 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. The filter flushed or, if needed, replaced; fresh diesel in; then a test of the car. After that our engineers fire it up and make sure it runs correctly before leaving. If the engine hasn't run, the majority of jobs take about half an hour once we are there, using pumps that are fine on a working forecourt and quiet enough to use outside a house after dark. Your insurer usually wants an engineer's report and your VAT invoice, and both are yours at the end. Payment comes on the day, with no money upfront. Many insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## About Hitchin Square itself Hitchin Square is a locality in the Greater London area, situated near the River Lea and close to the cities of London and Bow. Hitchin Square sits at a low elevation of around 16 metres, with nearby places including Festubert Place and Old Ford. Hitchin Square is predominantly composed of flat housing, reflecting the urban character of the surrounding area. ## AdBlue drains in Hitchin Square and across Greater London As a neighbourhood, Hitchin Square has the same vans as surrounding places — Festubert Place, Old Ford — all the way across E postcodes and the wider area beyond. Quickest of all: give a E3 5 postcode for the van. Moving your car isn't necessary. Draining happens on the spot, whether a drive, a road near St Paul's, or a layby towards St Stephen's Green. Awkward to explain, like the back of Bow Community Centre? By a county line? Checking beats assuming, so phone. ## In short, for Hitchin Square people Read the cap before you pour. AdBlue in your diesel tank regardless? Leave the car switched off then phone 0333 366 0103; Petrol in Diesel drains it where it stands, across Greater London.