An AdBlue fault on a Peugeot BlueHDi is most commonly caused by a failed NOx sensor, an AdBlue quality fault (P207F), or an SCR catalyst efficiency fault (P20EE). Peugeot’s SCR system is among the more sensitive in the market particularly…
An AdBlue quality fault means the vehicle’s ECU has detected that the fluid in the AdBlue tank is not the correct concentration either too dilute, too concentrated, contaminated, or degraded. It does not necessarily mean the fluid actually is wrong.…
A NOx sensor measures nitrogen oxide levels in the exhaust before and after the SCR catalyst to confirm the AdBlue system is actually reducing emissions. An AdBlue quality sensor sits inside the AdBlue tank and measures whether the…
Done properly, an AdBlue delete doesn’t damage the engine. It removes the AdBlue and SCR emissions strategy from the ECU, not anything the engine actually needs to run on, so the engine carries on doing exactly what it did before.…
An AdBlue warning symbol on your dashboard is your vehicle’s way of telling you the SCR system needs attention. Sometimes that’s nothing more than a low fluid level. Other times it’s a genuine fault that no amount of AdBlue will…
A steady AdBlue light can still point to low fluid or an early warning. A flashing warning often feels more urgent because the system is no longer happy with something on the SCR side and wants your attention before the…
An AdBlue delete works by reprogramming the vehicle’s ECU the engine control unit to remove the software logic that monitors, requires, and enforces the AdBlue SCR (Selective Catalytic Reduction) system. After a delete, the ECU no longer looks for AdBlue…
An AdBlue system repair in the UK usually costs between £100 and £700. A basic warning light reset sits near the bottom of that range. Replace a pump, an injector, or a couple of sensors together, and you’re looking closer…
Yes, AdBlue crystallisation can be repaired in most cases, and in many situations it is the cause of fault codes that were assumed to indicate component failure. When AdBlue fluid evaporates or is exposed to heat, it leaves behind solid…
AdBlue pump replacement costs in the UK typically range from £400 to £800 for most vehicles. At a main dealer, the cost of an AdBlue pump replacement is often quoted at £1,000 to £1,800, depending on the vehicle, whether OEM…
24 hours a day, 7 days a week — including same-day callouts.
© 2026 AdblueFault. All rights reserved.
