--- title: St Erth: AdBlue in a Diesel Tank, What Next canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/st-erth-cornwall/ location: St Erth county: Cornwall latitude: 50.165360 longitude: -5.430900 service: AdBlue in a Diesel Tank updated: 2026-10-02 --- # AdBlue in the Diesel Tank in St Erth, and What to Do Next Has the motor run since the AdBlue got in? That single point settles almost everything else from here. Anywhere your car stands — Griggs, St Erth — never run an engine that has not been started yet. Call 0333 366 0103 with the ignition and engine both off. Across St Erth, such a case is generally drained and cleaned on the spot. If it has run, stop as soon as it is safe then switch off. A larger job, yes, but the same first move. Further down: the cases our technicians meet, anywhere in Cornwall. Choose the one that fits. ## At the pump in St Erth: AdBlue in a diesel You are at the petrol pump, the nozzle or the bottle still in your hand, and you have just noticed the cap you opened was the wrong one. Possibly you are at the the nearest petrol station, possibly at the Texaco, perhaps somewhere else in St Erth. Put simply: no better place exists to spot it. Just the tank has AdBlue; not one component beyond it has taken any in. Do this: keep out of the driver's seat, even if the pump wants clearing. Have the staff to lend a hand pushing it into a space, hold on to the bottle, then phone us right there. Can't move the car beside the pump? Our explosion-proof equipment makes a busy forecourt sensible, so it can be drained where it is. ## At home around St Erth with AdBlue in the diesel tank On your dash, a warning had been lit for days. You bought a bottle, poured it in on the drive, and only when you put the empty bottle in the recycling did you look a second time at the cap. Homes just off School Lane are caught out as much as everywhere else. What it means: if you haven't driven since, this is almost as good as the forecourt. Diesel and AdBlue stay apart: the AdBlue drops to the base of your tank and stays put, however long the night. Next: stop an early move by putting the keys indoors, then ring us. We drain the car on your drive, whether that is in St Erth or out in Chenhalls. Night-time clears beside a house are no problem: the pumps are quiet. ## AdBlue in a diesel and already driving in St Erth? Rough running, smoke, lost power or a lit dashboard started a short way after the top-up. Chapel Hill, say, or the route towards Truro — a run of under 25 miles. The point: the system has drawn AdBlue through by now. Distance decides how deep it goes: filter and pipework to begin with, then the injection pump and each injector. Every restart, like every mile, pushes it deeper. What to do: pull over where it's safe to do so then switch off. St Erth sits over 50 miles from the M5; there, come off at the next junction instead of pushing on for the services. It will not have cleared, and so there is no sense restarting to check. Tell us hear the mileage driven when you call. ## AdBlue in the wrong tank of a hire, lease or company car It's a motor you have had for a week. Your own vehicle either has no AdBlue or keeps it somewhere different, and so no one told you the AdBlue cap was just next to your diesel. It can happen to anyone, anywhere around Cornwall. Put simply: one extra stage on top of the situations above, which depend on whether it's run. Any work on the car frequently requires the owner's approval under hire or fleet terms. Your move: hire firm or your fleet manager first, us next, because sorting it beforehand cuts time. Stranded by War Memorial or outside the nearest station until the firm replies, your car stays turned off the whole time. ## Not sure it was AdBlue in the diesel tank, St Erth? Truthfully, the best answer may be that you think so. Lighter, the bottle; a hint of ammonia round your filler; a hazy memory of the cap. Look familiar? It might have been at a friend's driveway in Canons Town, or in a rush by St Erth Community Primary School at the school run. The point: your engine isn't harmed by some AdBlue spilled on the filler. In the diesel tank, by contrast, AdBlue harms it. Starting your car cannot tell you which, and if there is AdBlue in the tank it would draw it in. What to do: treat it as if it was put in. Don't crank it. Inspecting a tank that turns out clean is better than emptying one once it has been run — so phone and describe to us what you noticed. ## What every AdBlue drain in St Erth has in common The work opens identically, whichever the case. Three questions are asked when we arrive — on a filling station, a drive, a street by a street just off the centre or the car park at Star Inn: the liquid, the amount, and whether the motor has been started. Those answers settle the work, and you get our price by phone, before anybody heads out. Draining your tank comes first, followed by a full flush — more vital with urea than with petrol, since crystals and corrosion won't go on their own, no matter how long you wait. Then comes your filter — cleaned, or swapped when needed — followed by fresh diesel, and a test of your car. The majority of unstarted cars are a half-hour job after the moment we get there. Our engineers start the car at the end. Our engineers check it runs correctly on fresh diesel before we go. We do the entire job where the car is, and permanent damage is very unusual if it has been spotted early. For your insurer: the engineer's report and the VAT invoice. For you: payment that day, nothing upfront. Worth knowing: many insurers offer misfuelling cover, so a check of your policy while you wait pays. ## About St Erth and where it is St Erth is a small coastal village in Cornwall, situated near the mouth of the River Hayle and close to the beaches of St Ives Bay. St Erth sits at a low elevation of around 15 metres, with its terraced housing reflecting the village's historic development. St Erth is surrounded by nearby places such as Chenhalls, Trelissick, and Rose-an-Grouse, and is approximately 18 miles from the city of Truro. St Erth has a population of around 869 residents, who enjoy the village's scenic coastal setting. ## St Erth and Cornwall: AdBlue drains across the area St Erth is a coastal village, and the same vans that cover it work the places around it too, Trelissick and Rose-an-Grouse among them, across the TR postcode area. Telling us a TR27 6 postcode finds you quickest of all. Central St Erth or a layby towards St Erth Pits: wherever it is, your car doesn't need to shift at all for us. Where it sits, that is where it is emptied. Guessing won't help beside Kingdom Hall of Jehovahs Witnesses, on a border or anywhere awkward to describe; phone and check. ## In one line: your scenario Not run yet: keep the car off and call. Whatever line fits, Petrol in Diesel takes over from there on 0333 366 0103, across Cornwall and in St Erth — once you pull over, turn off and ring, if it's run.