NOx Sensor Repair – Chester-le-Street

NOx sensors monitor the level of nitrogen oxide emissions in your vehicle’s exhaust system, working alongside the SCR (Selective Catalytic Reduction) system and AdBlue to keep emissions within legal limits. When a NOx sensor fails, it typically triggers a warning light, can push the vehicle into a reduced performance mode, and will almost certainly cause an MOT emissions failure if not resolved.

Why NOx Sensors Fail

NOx sensors operate in a harsh environment with high temperatures, exhaust gases, and vibration all contribute to degradation over time. They’re a known wear item on modern diesel vehicles, particularly those covering high mileage or running in stop-start urban conditions. Contamination from a faulty AdBlue system can also accelerate sensor failure.

Diagnosis Before Replacement

A fault code pointing to a NOx sensor doesn’t always mean the sensor itself has failed. The SCR system, AdBlue delivery components, and wiring can all generate similar codes. At A Hedley Motor Engineers , we carry out a proper diagnostic assessment before recommending a replacement, so you’re not spending money on a part that wasn’t the root cause.

What’s Involved

NOx sensor replacement varies in complexity depending on the vehicle. On some, the sensor is accessible with reasonable ease; on others, it requires more involved work around exhaust or underfloor components, and of course, we’ll give you a clear price before we start.

We carry out NOx sensor diagnosis and repair on cars and vans at our Chester-le-Street workshop. If your emissions warning light is on or you’ve been flagged at an MOT, get in touch.

A Hedley Motor Engineers is proud to be affiliated with the Institute of the Motor Industry (IMI), and to partner with Payment Assist to give our customers another way to pay for repair bills.

To find out more about NOx Sensor Repair in Chester-le-Street, contact us online, or call us directly on 0191 388 9066.

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