Find what your AdBlue, SCR or NOx code means and how it’s fixed. Mobile repair from £249, with a lifetime warranty.
Tell us about your vehicle — we’ll reply with a fixed price.
Search by code or symptom, or filter by system.
| Code | Meaning | Common cause | Link |
|---|---|---|---|
| P20E8 | Reductant pressure too low | Failing dosing pump or blocked line | |
| P204F | Reductant system performance | Pump, injector or ECU strategy fault | |
| P20EE | SCR NOx catalyst efficiency below threshold | Worn catalyst or faulty NOx sensor | |
| P229F | NOx sensor signal stuck | Aged or failed NOx sensor | |
| P2200 | NOx sensor circuit malfunction | Wiring or connector fault | |
| P20E9 | Reductant pressure too high | Blocked line or pressure control fault | |
| P208A | Reductant pump control circuit | Pump wiring or driver fault | |
| P20BD | Reductant heater control circuit A | Failed tank or line heater | |
| P20BA | Reductant heater control circuit B | Failed tank or line heater | |
| P204C | Reductant tank sensor circuit low | Tank sensor or wiring fault | |
| P207F | Reductant quality / performance | Poor fluid quality or quality sensor fault | |
| P2047 | Reductant injector circuit low | Faulty injector or wiring |
Don't see your code? Send it across for a fixed-price quote.
What to do: Get it diagnosed soon. It rarely clears itself and usually leads to a countdown.
Our coverage extends across Warwickshire, including Warwick, Rugby, Nuneaton, Leamington Spa, Stratford-upon-Avon, Kenilworth, Bedworth and Atherstone. Other locations can also be considered based on the exact postcode and vehicle.
Yes, where the location is suitable for the required mobile service and you have permission for the work to be carried out there.
Where practical, yes. Tell us where the vehicle is currently located, what it is showing on the dashboard and what vehicle you have so we can assess the situation.
No. If the vehicle continues to display a warning after the correct fluid level has been restored, another part of the monitored system may be responsible.
A countdown generally indicates that the vehicle has detected an unresolved condition that may eventually affect its ability to restart. The exact warning and diagnostic information should be checked rather than relying on the countdown alone.
It can be. NOx sensors provide information used in monitoring the emissions-control system, so a sensor fault can appear alongside SCR or AdBlue-related warnings.
P208E relates to a reductant injection valve being detected as stuck closed. The exact diagnostic procedure depends on the vehicle, so the code should be considered alongside the make, model and other stored information.
Send your vehicle registration, make and model, postcode, dashboard warning and any diagnostic code you have. A clear dashboard photograph can also be useful.
Yes. Coverage includes areas such as Nuneaton, Bedworth and Atherstone, as well as other suitable locations across the county.
Yes. Suitable HGVs can be considered for relevant AdBlue services and HGV Remapping.
