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NOx System Repairs & Solutions

Expert diagnostics and permanent solutions for NOx sensor faults and SCR system problems. Clear warning lights and restore performance.

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10,000+Vehicles Tuned
4.9Star Rating
10+Years Experience
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NOx Sensor & SCR System Specialists

NOx (Nitrogen Oxide) sensors monitor exhaust emissions and are a critical part of the Selective Catalytic Reduction (SCR) system in modern diesel vehicles. When these sensors fail, they trigger warning lights, limp mode, and can lead to expensive main dealer repair bills.

At EcoMax Tuning, we specialise in diagnosing and resolving NOx sensor faults. In many cases, our ECU-based solutions can permanently resolve the issue without the need for costly sensor replacement.

We've helped hundreds of customers across Peterborough and Cambridgeshire resolve NOx system problems quickly and affordably.

Common NOx Fault Codes

P2200P2201P2202P2203P229EP229FP20EEP20EFP2BADP2BAEP2BAFP11CC

If you're seeing any of these codes, we can help.

Our Solutions

ECU Recalibration: From £249

Software-based solution to resolve NOx sensor faults without physical replacement.

Sensor Replacement

Quality replacement sensors fitted at competitive prices when physical repair is needed.

Courtesy Cars Available

Need to stay mobile? Courtesy cars are available on request.

Frequently Asked Questions

Common symptoms include the engine management light illuminating, reduced power or limp mode, increased AdBlue consumption, dashboard warning messages about the SCR system, and potential MOT failure on emissions.

In many cases, NOx sensor issues can be resolved through ECU recalibration without replacing the physical sensor. Where replacement is needed, we source quality parts at competitive prices and fit them professionally.

ECU-based NOx solutions start from £249. Physical sensor replacement varies depending on the vehicle but is typically significantly less than main dealer pricing. We always diagnose first and give you a clear quote.

Yes. A properly functioning NOx system is essential for passing the emissions portion of the MOT. Our repairs restore the system to correct operation, ensuring your vehicle meets MOT requirements.

Check Out Our Videos on YouTube

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Book your appointment today or get in touch with any questions.