Citroën Berlingo AdBlue (DEF) System Repair (2008-2018)

Common problems

• Internal corrosion or water ingress
• Short circuits or internal electrical faults
• Crystallisation of AdBlue fluid around the injector or level sensors
• Faulty temperature, level, or quality sensors within the tank
• P20E9 00 Fault Code – AdBlue/DEF Fluid Pressure: Drift Upwards

Citroën Berlingo AdBlue (DEF) System Repair Service

AdBlue was introduced with the Euro 6 emissions regulations to help cut the harmful nitrogen-oxide (NOx) output of diesel engines.

When the system develops a fault, the dashboard typically shows an “Emission Control Fault” message and illuminates the engine warning lamp. If left unresolved, the vehicle can drop into limp-home mode or display a mileage countdown after which it will refuse to restart.

Commonly Affected Part Numbers:

9808625280, 9818531680, 9849387080, 9868018531, 9817601880, 16882619780, 1682615280

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