Mon–Fri 8:30am–5:30pm · Sat 9am–1pm
Diagnose and repair faulty NOx sensors without the dealer price tag. Fix AdBlue warnings and emissions faults.
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NOx sensors measure the level of nitrogen oxide in your vehicle's exhaust gases. Modern diesel vehicles typically have two — one before and one after the SCR catalytic converter (the AdBlue system). When a NOx sensor fails, it can trigger the engine management light, AdBlue warnings, and in some cases, the dreaded countdown to engine restart lockout.
New NOx sensors from the dealer are expensive — often £300-£600 per sensor, and some vehicles have two or three of them. Before committing to that kind of spend, it's worth having the system properly diagnosed. Not every NOx-related fault code actually means the sensor has failed — sometimes it's a wiring issue, a software glitch, or a problem elsewhere in the emissions system that's causing incorrect readings.
At Doyen Auto Services in Rutherglen, we diagnose NOx sensor issues using dealer-level equipment. We check sensor readings against known-good values, inspect wiring and connectors, and confirm whether the sensor itself has actually failed or whether the fault lies elsewhere.
Here’s what to expect when you bring your vehicle to Doyen Auto Services
We read all emissions-related fault codes and check NOx sensor live data to identify abnormal readings.
Before condemning the sensor, we check the wiring and connector for damage, corrosion, or poor contacts.
If the sensor has genuinely failed, we fit a quality replacement and calibrate it to the system.
All fault codes are cleared, any AdBlue countdowns are reset, and the system is verified with a test drive.
We’re a specialist automotive garage in Rutherglen, Glasgow, with the equipment, experience, and honest approach to get the job done right first time.
Dealer-level diagnostic equipment for reading NOx sensor live data
We diagnose the actual cause — we don't just throw a new sensor at every NOx fault code
Competitive pricing on quality replacement sensors
Experienced with common NOx failures on VAG, BMW, Mercedes, and PSA vehicles
Common questions about this service at Doyen Auto Services
Get in touch today to book your nox sensor repair at our Rutherglen workshop. Online booking or call us directly.
59 Southcroft Road, Rutherglen, Glasgow G73 1SP · Mon–Fri 8:30am–5:30pm, Sat 9am–1pm
