--- title: AdBlue in a Diesel Tank Little End? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/little-end-cambridgeshire/ location: Little End county: Cambridgeshire latitude: 52.410810 longitude: -0.075630 service: AdBlue in a Diesel Tank updated: 2026-10-19 --- # AdBlue in a Diesel Tank in Little End: Why It Happens and How to Prevent It Stop here a minute if your diesel tank already has AdBlue in it: ignition off, engine off, then phone 0333 366 0103. Around Little End, finding it before your engine turns normally means draining and a full flush where it stands. Here before the event? In that case what follows explains how it happens and how to prevent it happening at all. ## AdBlue in a diesel motor: two tanks, two fillers No single fluid but two: that is how plenty of newer diesels near Little End and Fenton run, with diesel feeding your motor. Stored in a tank of its own, AdBlue is fed into the exhaust gas to clean it. Different tanks, separate fillers. Other vehicles put the AdBlue filler in the boot or under the bonnet; a lot of others place both side by side behind one flap. At the petrol pump, the diesel side gets filled constantly. The AdBlue side is filled far less often, normally from a bottle, and usually by a person who has to stop and think where it goes. Mistakes happen in the gap between them. ## Little End: how AdBlue in the diesel tank occurs Three things tend to come together, and carelessness is seldom one of them. On a driveway off Coronation Avenue before work, or in the car park at The Royal Oak heading home: that's where the hurried top-up happens. What is the reason for the rush? As AdBlue runs low your car tells you, and if it's gone, limp mode kicks in. Unfamiliar vehicles come second, too. Hire cars, new cars and company motors place their fillers differently, and the hand reaches for the cap it used on the old one. Lastly, the spout goes in: diesel filler or AdBlue one, it goes in as readily, and after the tip starts, nothing halts it. It's seconds, whether in Mill End or bang in the heart of Little End. ## How to tell the AdBlue filler from the diesel one A few seconds is all the checks take — so run through them before you tip anything, on a driveway in Wistow or a forecourt in Little End. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". The diesel cap usually isn't. Read it instead of going by position. - Check the size: the smaller filler neck is, on plenty of vehicles, the AdBlue one. - The flap. Look inside your fuel flap for a label. Many vehicles say there which fuel goes where. - Can't see it beside the diesel filler? In that case check beneath the bonnet or in the boot — the handbook will say which. - Ask the person who drove it last — before you leave, not when the light comes on — if you pick up a hire or company car from somewhere like the car park outside Huntingdon. ## Topping up AdBlue without it reaching your diesel tank For the day the warning appears — anywhere it is in Cambridgeshire — a routine to follow. - Turn off after you park — level ground, motor off, and never rushed by Fox Hole Close on the verge. - Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and read it. Daft, yes, yet it does the trick. - The two behind one flap? So confirm the lid on the diesel side stays shut ahead of lifting the bottle. - Gently is best, through the bottle's own spout, till it's full or the bottle is empty. - Close the cap, then look once more — confirm the diesel filler remained closed the whole time. Only then, start the car. Spot at step two or three that it's already gone into the diesel side? So stop right there. Leave out step five altogether. ## Already put AdBlue in the diesel tank in Little End? Don't start the motor: that's where the short order of things starts. On many diesels your ignition alone runs the fuel pump, and so do not switch it on. Thinning it with extra diesel won't work, since AdBlue sinks to the bottom instead of blending — and that's where your fuel is drawn from. The attendants at Ouse Valley Autos, Shell or another forecourt will normally help pushing the vehicle clear when you ask. Leave it where it is if you're on your own driveway around Little End. If your motor has already run, stop as soon as it is safe and switch off. On the A1(M), under 10 miles from Little End, that means the next junction. Distance counts — a quick hop across Little End is a smaller job than heading under 15 miles towards Peterborough — so tell us roughly how far it went. ## When our engineers turn up in Little End, what happens? Wherever the vehicle came to rest, be it outside Warboys Primary Academy, beside Warboys Village Sign or at home, our van comes to it. Those answers settle this work and the quote, so our technicians ask what got in, about how much, and if it's run. During the phone call itself, you hear our quote — before anything else. The fuel system is then flushed thoroughly, once your tank is cleared. AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it doesn't wash out on its own — which is why that counts more here than with petrol. Once your filter is cleaned — or replaced, if needed — clean diesel goes in, and then your vehicle gets tested. Before we leave, our technicians fire it up and check that it's running smoothly. If your motor hasn't run, the majority of jobs take about half an hour once we are there, using pumps that are safe on a busy 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 deposit. Plenty of insurance policies include misfuelling cover, so it's worth checking yours while we are on the way. ## About Little End, for a moment Little End is a suburban area in Cambridgeshire, situated inland at an elevation of 26 metres, and located approximately 13 miles from Peterborough. Little End is characterized by its predominantly detached housing stock, and is part of a network of nearby settlements including Mill End, Warboys, and Ramsey End. Little End has a population of around 2033 residents, and is positioned about 62 miles north of London. ## Little End and Cambridgeshire: AdBlue drains across the area Throughout PE postcodes, our teams covering Little End — a residential suburb — work the surrounding places too, Ramsey End and Warboys among them. Quote a postcode beginning PE28 2, and the van gets there fastest. Moving the car is not necessary. Wherever it sits — beside Grace Baptist Church, on a lay-by heading to Pingle Wood, on a drive — that's where it is emptied. Tricky to explain, like the back of Cambridgeshire Village of the Year Sign? Close to a border? Asking is better than assuming, so phone. ## The short version for Little End drivers Before you tip, read the cap. AdBlue in your diesel tank after all? Keep it switched off and call 0333 366 0103; Petrol in Diesel drains it on the spot, throughout Cambridgeshire.