Expert NOX Sensor Bypass Services Across the UK

If your diesel vehicle is suffering from persistent NOx sensor errors, dashboard warning lights, or limp mode due to AdBlue system faults, STX Tuning offers a safe and effective NOx sensor bypass solution.

Client Reviews

Why Bypass a Faulty NOx Sensor?

A Smarter Alternative to Expensive Repairs

NOx sensors are prone to failure and often trigger limp mode, dashboard errors, and MOT issues. Replacing them can cost hundreds of pounds—and sometimes doesn’t resolve the underlying problem. Our software-based bypass offers a reliable, cost-effective solution for off-road or export vehicles, helping you avoid ongoing repair bills and downtime.

Why STX Tuning is the Right Choice for NOx Sensor Bypass

10+ Years of Expertise

Decade-long experience in ECU remapping and performance upgrades with deep technical know-how.

400+ Five-Star Reviews

Proven customer satisfaction across hundreds of happy clients—your car is in trusted hands.

Specialists in Vehicles

Tailored tuning solutions specifically for Volkswagen, Audi, SEAT, Skoda, and BMW models.

Mobile Service Across England

Can’t visit? No problem. Our expert mobile technicians come to you—fast and hassle-free.

Advanced Emission Solutions

From AdBlue delete to NOx sensor bypass, we fix common diesel issues safely and effectively.

Custom & Safe ECU Remapping

Every tune is carefully calibrated for optimal performance, reliability, and drivability.

Common NOx System Issues We Fix

NOx sensor warning lights and emissions-related dashboard faults
Limp mode caused by NOx sensor failures or faulty wiring
NOx sensor circuit malfunction codes such as P2200, P20EE, and related errors
Emissions system errors leading to reduced engine power and drivability issues
Costly NOx sensor replacements and recurring system breakdowns

Common AdBlue Fault Codes

P20E8 Reductant Pressure Too Low
P204F Reductant System Performance
P207F Reductant Quality Performance
P20EE SCR NOx Catalyst Efficiency Below Threshold
P2200 NOx Sensor Circuit Bank 1
P2201 NOx Sensor Circuit Range/Performance Bank 1
P229F NOx Sensor Range/Performance Bank 2
P2BA9 NOx Exceedence – Insufficient Reagent Quality
P2BAE SCR System Efficiency Below Threshold
P2BAC NOx Exceedence – Deactivation of EGR

Everything you need to now

What is a NOx sensor and why does it fail?

NOx (nitrogen oxide) sensors monitor emissions in diesel vehicles. They’re sensitive components that can fail due to contamination, age, or AdBlue-related faults.

Is bypassing the NOx sensor legal?

No, it is not legal for vehicles driven on UK public roads. The service is for off-road, motorsport, or export-only use.

What happens when you bypass the NOx sensor?

We disable NOx monitoring via software, removing fault codes, warning lights, and limp mode restrictions.

Will it affect AdBlue warnings or countdowns?

Yes, bypassing the NOx sensor often removes AdBlue-related faults, including non-start countdowns and system errors.

Can the bypass be undone later?

Yes, we can revert the ECU to its original factory configuration if needed for resale or compliance.

Which vehicles can this service be applied to?

Our NOx sensor bypass is compatible with many diesel models, including popular vehicles from the VAG group, BMW, Mercedes-Benz, Ford, and others. Contact us for specific vehicle support.

We Provide NOx Sensor Bypass for All Major Diesel Models:

Audi: A3, A4, A5, A6, Q3, Q5, Q7, Q8
BMW: 1 Series, 3 Series, 5 Series, X3, X5, X6
Ford: Focus, Mondeo, Kuga, Transit, Ranger
Mercedes: C-Class, E-Class, Sprinter, Vito
Peugeot: 208, 308, 508, Boxer, Partner, Expert
Citroën: C3, C4, C5, Berlingo, Dispatch, Relay
Volkswagen: Golf, Passat, Tiguan, Crafter, Transporter

Land Rover: Range Rover, Discovery, Evoque, Velar
Renault: Megane, Kadjar, Trafic, Master, Kangoo
Toyota: Hilux, Proace, Land Cruiser, RAV4
Hyundai: Santa Fe, Tucson, i800 Van
Jaguar: XE, XF, F-Pace, E-Pace
…and many more diesel makes and models.

How We Save Your Time & Money

No more frequent AdBlue top-ups
Avoid expensive NOx sensor and injector replacements
No more unexpected breakdowns or limp mode activations
Convenient on-site service with no garage visits
Safe, fast, and 100% permanent solution

STX Tuning – The Leading Mobile AdBlue Removal Experts in England
01753 439130
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