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Overfilling Diesel After Pump’s First Click Could Cost Drivers Thousands, Expert Warns

The guidance says extra fuel forced in after the automatic shutoff can damage modern diesel fuel systems.

Overview

  • A1 Diesel CEO Aldis Ozols says forcing fuel past the automatic shutoff can flood vapour‑recovery plumbing, contaminate the charcoal canister and jeopardise sensitive high‑pressure components.
  • Estimated repair costs range from roughly £200–£400 for a charcoal canister replacement to more than £3,000 if injectors or the high‑pressure pump are damaged.
  • Reported signs of trouble include persistent check‑engine lights, reduced fuel economy and, in severe cases, emissions‑system failure.
  • Industry guidance frames the first click as a safety feature, with Ozols advising drivers to stop at that point, consult their vehicle handbook and avoid trying to round up the transaction.
  • With fuel prices rising, more motorists try to squeeze extra litres, but the coverage reflects expert commentary rather than a regulator‑issued advisory or recall.