NOX Sensor for Renault Trafic B 2014-2021 1.6 D & Master B 2010 2.3 D 227905433R

Restore correct AdBlue dosing and emission control on modern diesels on your Renault Trafic B (2014–2021) with this direct-replacement nox sensor — also known as the SCR sensor, nitrogen oxide sensor or exhaust NOx probe. Built to OEM specification and matching part numbers TR227905433R, 93457718, 93463067, 95528773 and 6.000.616.938.

Common signs of failure

A failing NOx sensor on diesel vehicles typically triggers fault codes P220A, P220B, P220C, P229F or P207F (NOx sensor circuit / SCR system efficiency). Drivers see the engine warning light come on, an AdBlue or 'Emissions' warning on the dashboard, often a countdown 'Vehicle will not start in X miles' message, and in many cases the vehicle entering limp mode. Left unaddressed, the ECU will eventually prevent the engine from restarting until the fault is cleared.

Fitment notes

Direct-fit replacement, with the original wiring harness and ECU connector. After fitting, the sensor needs a short re-learn drive cycle (typically 5–20 minutes of motorway driving) for the ECU to calibrate to the new probe. Some manufacturers recommend resetting adaptations with a diagnostic tool — useful but not strictly required on most models. Standard 5 pin connector. Position: Downstream Rear After the Catalyst Position 2 Post CAT Bank 2.

Frequently asked questions

Where is the NOx sensor located?

Most diesel vehicles have two NOx sensors: one upstream and one downstream of the SCR catalyst/AdBlue injection point. Identify whether your fault is for the inlet or outlet sensor (the code and live data will tell you) before ordering.

Will it fix my limp-mode and AdBlue warning?

Yes, if the fault code points to the NOx sensor itself. After fitting, clear the codes and complete a regen drive cycle — warnings usually clear within a few miles.

How long do NOx sensors last?

Typically 80,000–120,000 miles, though heavy stop-start driving and poor-quality AdBlue can shorten lifespan. Replacement at the first sign of failure prevents the vehicle locking you out.