A NOx sensor measures nitrogen oxide levels so the SCR system can control dosing and monitor emissions performance.
What does it mean?
A NOx sensor measures nitrogen oxide levels so the SCR system can control dosing and monitor emissions performance.
Symptoms to look for
A failed or implausible sensor may trigger an AdBlue warning, SCR fault, countdown, emissions light or limp-mode style behaviour.
Possible causes
Sensor failure, wiring, connector damage, exhaust heat, contamination or another SCR fault can produce similar symptoms.
What diagnostics check
Testing compares sensor readings with operating conditions and checks the connector, wiring, fault history and related dosing system before a sensor is condemned.
What should happen next?
Replacing a sensor without checking the wider system can leave the warning unresolved. S7 Remaps can investigate the NOx-related fault and advise on the appropriate repair. Do not use a software change to hide an unresolved mechanical or emissions-system fault. A proper diagnosis should establish the cause before a solution is chosen.
Related AdBlue support
Read the main AdBlue diagnostics and solutions service for mobile support across Preston, Lancashire and relevant nearby areas.
Frequently Asked Questions
It can. The exact warning depends on the vehicle and fault, so the stored codes and live data need to be interpreted rather than guessed from the dashboard message.