The exhaust gas monitor warning light on my Renault clio is premanently on what could this be?

If the exhaust gas monitor warning light on your Renault Clio is permanently on, it could indicate an issue with the vehicle's emissions system, such as a faulty oxygen sensor, catalytic converter, or exhaust gas recirculation (EGR) system. It may also suggest a problem with the engine management system or a related sensor. It's advisable to have the vehicle diagnosed using an OBD-II scanner to identify the specific fault codes and address the issue promptly to avoid potential damage or increased emissions.