Citroën shares its BlueHDi engines and SCR strategy with Peugeot, so the symptoms and fixes are almost identical. The Berlingo van and the C4/C5 Aircross are the most common vehicles we see in the workshop.
Affected Citroën models
Citroën Berlingo 1.5 & 1.6 BlueHDi
Citroën Relay 2.0 BlueHDi
Citroën Dispatch 1.6 & 2.0 BlueHDi
Citroën C3, C4, C5 Aircross BlueHDi
DS3, DS4, DS7 Crossback BlueHDi
Warning lights and messages you'll see
'AdBlue: starting impossible in 1,100 mi' — the classic PSA countdown message.
'Anti-pollution fault' with amber engine light.
'Emissions system fault — see owner's manual'.
Why a permanent fix pays for itself
A single dealer diagnosis and NOx sensor replacement can exceed £600 — and often needs redoing.
Our AdBlue removal is a one-time fix backed by a lifetime warranty, usually completed on your driveway in under 90 minutes.
Frequently asked questions
Does removal work on the Citroën Relay?＋
Yes. The Relay is a common vehicle for commercial operators and we can complete the removal on-site to minimise downtime.
Will it affect my Citroën's fuel economy?＋
No — most owners report identical or slightly improved MPG once the SCR strategy is disabled and the ECU is no longer running enrichment cycles.