With the little information you provide ... I suppose it is a diesel, and that malfunction occurs when you have problems in the caudalimetro or in the EGR valve .. it is not a norm, but it is the most normal. Now I would first check the state of the flow, it is a very delicate element because it works by a very fine filament, so you have to proceed with great care in disassembly, cleaning although not recommended and then the assembly, changes, if you have not done so, the air filter that influences the useful life and correct functioning of the aforementioned flow. The other thing that can be checked is the EGR valve, which is also usually dirty due to its functioning of recirculating exhaust gases in the admission. The way of proceeding is almost the same, it is disassembled and cleaned. There are also cleaning sprays of said valve ... although I doubt its effectiveness.