Get Support
07503 134362
Citroën & Vauxhall AdBlue Faults: P20E9, U029D & Other Codes
Citroën and Vauxhall vans are some of the most common we attend for AdBlue-related faults. Codes like P20E9 (reductant pressure too high) and U029D (lost communication with the NOx sensor) can put a van into limp mode or start a no-start countdown at the worst time. Here’s a clear guide…
By: 
Vauxhall Movano P20E9 High-Pressure Alert – Mobile Fix Explained
The Vauxhall Movano scrubs exhaust fumes with an AdBlue pump that should prime to five bar and then settle at three. When the pressure sensor spikes above nine bar the ECU logs P20E9 – Reductant Pressure Too High and the dash flashes a yellow DEF lamp. Left alone it climbs…