--- title: What Now? AdBlue in a Diesel Tank Knights End canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/knights-end-cambridgeshire/ location: Knights End county: Cambridgeshire latitude: 52.534000 longitude: 0.075940 service: AdBlue in a Diesel Tank updated: 2026-10-15 --- # AdBlue in the Diesel Tank in Knights End: What Now? Has your engine run since the AdBlue was put in? This one point decides almost everything else from here. Not run yet? Then keep the car that way, wherever your vehicle sits — Knights End or Eastwood End. Usually that means draining and properly cleaning it on the spot in Knights End — so leave the key and motor off and ring 0333 366 0103. Already run? Stop when safe, then turn it off. It's a larger job, yet step one doesn't change. Anywhere around Cambridgeshire it happened, one of the situations below fits yours. ## On a Knights End forecourt with AdBlue in a diesel Only at this point, bottle still in your hand, you realise that the cap you opened was the wrong one, right at the pump. Whether Gulf, Jet or anywhere else in Knights End, the case is identical. In short: no better spot to be to spot it. No pump has pulled it in, and so the AdBlue sits only in that tank. Freeing the petrol pump is no reason to start it — and so do not get back in. Ring us from the forecourt once your vehicle sits in a space — the staff will lend a hand to push it — and save the receipt. Stuck beside the petrol pump? Our explosion-proof equipment keeps a live forecourt sensible, and so it can be drained where it is. ## AdBlue in the diesel tank on a Knights End drive? Days had passed with the dash light on. Bought a bottle, tipped it in outside the house, recycled the empty — and only then checked the cap a second time, too late. It happens on drives just off Mill Hill Lane as often as anywhere. Put simply: if the car has not been driven since, it's nearly equal to finding out at the forecourt. AdBlue does not mix with diesel; it sinks to the bottom of your tank and waits there. Overnight doesn't change that. Next: keys in the house, and so nobody takes your vehicle off first thing. Then, ring. Your driveway is where it gets emptied, whether in Knights End or Town End. The pumps are quiet enough to use outside a house after dark. ## On the road in Knights End with AdBlue in a diesel A mile or two beyond topping up, the engine began playing up: rough running, smoke, less power, warnings on your dash. Somewhere on Isle of Ely Way or else heading to Ely — under 15 miles away. What it means: the system has pulled the AdBlue in. It has been through your filter and the lines and, the further you went, into the high-pressure pump and the fuel injectors. More driving, more starts: deeper it travels. Pull in safely — that's the next step — then turn it off. Services further on can wait: on the A1(M), under 25 miles out of Knights End, take the first junction. Do not restart the car to see if it has cleared; it will not have. About how far did it go? Say so as you call. ## Hire, lease or company car with AdBlue in the wrong tank It is a vehicle you have had for a week. On your own car, AdBlue is missing or elsewhere. On this one, the cap is just next to your diesel cap — news to you. Any driver, anywhere around Cambridgeshire, could make it. Put simply: one extra stage on top of the cases above, which depend on whether it has run. The owner frequently has to sign off any work, under many hire and company agreements. What to do: call the hire firm or your fleet manager first, then us. That's faster settled before we get there than after. If you're stuck in the car park at March, or by St Wendreda's, while you wait for an answer, leave your car off. ## AdBlue in your diesel tank? Not sure, around Knights End At times the fair answer is "I think so". Lighter, the bottle; a trace of ammonia round your filler; a hazy memory of the cap. Look familiar? Perhaps it happened in a hurry at the school gates at Burrowmoor Primary Academy, or on a friend's drive in Badgeney. Put simply: spillage round the filler does the engine no harm. Once it is inside the diesel tank, though, it does. Starting the vehicle cannot tell you which, and if there is AdBlue in that tank it will pull it in. Your move: act as though it did, and don't start your motor. Checking a tank that proves clean beats draining one once it's been run — so phone and tell us what you noticed. ## The common ground in each Knights End AdBlue drain Whichever situation you are in, the job starts the same way. Filling station, drive, The Seven Stars's car park or a street by Stone Cross — the van comes to the vehicle, and three questions follow: what liquid, what amount, and whether it ran. Those answers settle the work, and you hear our quote by phone, before anybody sets off. AdBlue crystallises and is corrosive to some metals used in fuel systems, so it does not rinse out on its own; that is why a full flush, after the drain, counts far more with AdBlue than with petrol. The filter is flushed, or replaced where it needs to be; fresh diesel goes in; and the vehicle is tested. Where your engine hasn't run, allow roughly half an hour on site, in most jobs. We start the engine at the end. Before we head off, it is checked to confirm it runs smoothly on new diesel. Long-term damage is very unusual if it's spotted soon, and the entire job is done where the vehicle is. Payment comes on the day, never in advance. For the insurer, you get a VAT invoice and a report from the engineer. It is worth knowing: lots of insurers offer misfuelling cover, so a check of your documents as we travel pays. ## About Knights End Knights End is a small suburban area in Cambridgeshire, situated inland at a low elevation of around 5 metres. Knights End lies near the city of Ely, approximately 12 miles away, and is also close to other nearby places such as Town End and Little London. Knights End is characterised by its predominantly detached housing stock, reflecting its residential nature. Knights End is located about 71 miles from London, making it a relatively distant commuter location. ## AdBlue drains around Knights End, and across Cambridgeshire too Little London and March have the identical teams as Knights End, a residential suburb, along with further places throughout PE postcodes. Quickest of all: a PE15 9 postcode to show your location. No moving is required, whether stopped in the centre of Knights End or in a layby en route to Fenland Crematorium & Gardens of Remembrance, so leave it where it is. Draining happens right there. Tricky to pin down? Close to Trinity Church or a border? Asking is better than guessing, so phone. ## The one-line version Not run yet: keep the vehicle off then ring. Run by now? Pull over, turn off, ring. Petrol in Diesel takes over the remainder whatever case, in Knights End and Cambridgeshire, on 0333 366 0103.