How AdBlue Systems Work – And Why Removal Helps
Modern diesel cars use AdBlue to cut NOₓ emissions before they exit the tailpipe. While this system reduces pollutants, it can add complexity, cost, and can trigger warning lights if any component fails. Understanding how AdBlue fits into your engine’s emission controls explains why an AdBlue delete remap can bring lasting benefits.
What Is AdBlue?
AdBlue is a 32.5% urea solution mixed with deionised water. Stored in a separate tank, it feeds into the exhaust via an injector. Once it hits the hot exhaust gases, it vaporises and creates ammonia (NH₃), which reacts in the SCR (Selective Catalytic Reduction) catalyst to convert NOₓ into harmless nitrogen and water.
Key Components
- AdBlue Tank: Holds fresh urea solution; capacity varies by model.
- Injector Nozzle: Sprays precise doses into the exhaust.
- SCR Catalyst: Ceramic honeycomb coated with precious metals.
- NOₓ Sensor: Measures emissions before and after the catalyst.
- ECU: Monitors sensors and controls injection timing.
Common Issues
- Clogged Injector: Urea crystals form if fluid sits or freezes.
- Sensor Failures: Faulty readings lead to limp mode.
- Low Fluid Alerts: Unexpected refills can catch you off guard.
- Valve Sticking: Back-pressure spikes, reducing response.
Why Remove AdBlue?
- Reliability: No more AdBlue faults or limp-home modes.
- Cost Savings: Zero spend on AdBlue top-ups.
- Performance: Lower exhaust back-pressure for quicker throttle response.
- Reversible: Original map backed up for full restore.
Legal & Warranty Notes
- Track Use Only: On-road checks still expect a working SCR.
- Full Revert: We keep your original map for a quick rollback.
- Warranty: Lifetime software warranty covers tune stability.
Mobile Deletion Steps
- Consultation: Confirm ECU type and software.
- Call-out: We arrive at your Leicester address.
- Backup: ECU file saved to secure server.
- Apply Tune: SCR logic disabled and map refined.
- Diagnostics: Ensure no errors and smooth running.
This takes 90–120 minutes. Then you drive away with no AdBlue alerts and a sharper diesel.
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