Why does Peugeot 408 engine emit a warning light that is always on?

There are two common reasons for this failure phenomenon: \x0d\ 1. Vehicles often drive at low speed, and the engine is not fully burned, which leads to carbon deposition in the engine; \x0d\2。 Poor fuel quality will lead to abnormal engine operation. \x0d\\x0d\ It is suggested that the special contractor of Dongfeng Peugeot should inspect the engine system to confirm the cause of the failure. For faults caused by engine carbon deposit or poor fuel quality, clean the engine throttle and intake manifold carbon deposit according to the carbon deposit situation, replace qualified fuel, and use fuel additives approved by Dongfeng Peugeot.