Captur Hybrid Injection Fault

The symptoms you describe suggest a problem with either the fuel or air mixture. Given the age of the vehicle and mileage, it's possible a sensor is failing or a connector has become loose. Have you checked the cable and plug connections to the relevant components? Sometimes a simple reseating can resolve intermittent issues.

Thanks for the insight. By "relevant components", are you referring specifically to the fuel injectors and the mass airflow sensor, or are there other areas I should be focusing on? I'm trying to narrow down the scope before I start probing with a multimeter.

Yes, primarily the fuel injectors and MAF sensor, but also consider the throttle position sensor and oxygen sensors. Since it's a hybrid, also check the connections related to the electric motor integration, although the symptoms point more directly to the injection system. However, with those symptoms, I'd strongly advise a diagnostic check at a workshop.

Much appreciated for the advice. It turned out to be a defective plug connection on one of the fuel injectors, just as you suspected. A quick clean and reseat seems to have resolved the problem, and fuel consumption is back to normal. Total cost was 95€ for the diagnostic and repair. Thanks again!